Sunday, May 22, 2022

Neolithic Concepts of Time

 The Neolithic Cognitive Leap:

More Than a Revolution the New Stone Age
Involved a New Understanding of Time
By Rick Doble

Model of a Neolithic village. City Museum: Wels (Upper Austria).


ABSTRACT:
While all agree that the Neolithic era was a revolution, the change was even more monumental. While I believe Upper Paleolithic people could work with and plan short-term projects and processes, their way of life was generally one of immediacy. They did not store and save food for times of scarcity, for example. But in the Neolithic era, an understanding of long-term linear time allowed the societies to radically change their way of life by planning their farming over a year's time and then developing a large number of processes that required long-term conceptions. And it was this ability that allowed the Neolithic cultures to flourish.


INTRODUCTION

Imagine that after climbing a hill the member of a small nomadic hunter-gatherer tribe looked down on a Neolithic village for the first time. They would have seen hundreds of people wearing woven cloth garments who lived in one place with solid houses surrounded by carefully cultivated fields of grain. Because it was so strange, so fantastic, he or she might have thought it was a dream or mirage or believed it was from another world. 

In our modern world, we need to recapture this sense of awe. Because the Neolithic (New Stone Age) way of life was dramatically different from the earlier Paleolithic (Old Stone Age) nomadic hunter-gatherer lifestyle. While it used stone-age implements, it was a completely different way of living with its own unique technology. Instead of looking at the Neolithic era from a modern point of view that sees it as crude and primitive, we need to look at it from the POV of earlier humans who had lived successfully for millions of years as nomads and who lived in small bands as they foraged for food. They must have been astonished to see this very different way to live and survive.

In other words, to understand the Neolithic we need to put ourselves back into their time period and see it from that point of view. 

The problem, oddly, is that the Neolithic way of life is, in a way, familiar. It is like life in small villages that we know today. Yet because of its stone-age technology, this way of life is seen as backward. But we are the ones who have it backward. Small villages are based on Neolithic villages because they were invented by these cultures.

Model of a Neolithic village. City Museum: Wels (Upper Austria).

It is my contention that the modern age begins with the Neolithic era. For example, until about a hundred years ago and the impact of the industrial revolution, small farming villages were the norm for most nations around the world. In 1900 in the United States, for example, 40% of people farmed and 60% lived in rural areas. (Lusk, The Evolution of American Agriculture)

The great first civilizations of Mesopotamia and Egypt took the Neolithic model and made it much bigger, more sophisticated, and complex but it was dependent on a sedentary lifestyle supported by agriculture, domesticated animals, trade, and specialization that had been established in the Neolithic era.

Even the invention of metal technologies owed their origins to Neolithic skills. The Bronze Age, seen as a clear break from the 'primitive' stone age, depended on Neolithic inventions. Neolithic pottery kilns were able to achieve high temperatures which had not been possible before. And this ability led directly to the even higher temperatures necessary for metallurgy. Furthermore, the use of New Stone Age tools continued for thousands of years after the invention of bronze because they worked well, were easy to make, and were inexpensive (see more in this article).

"From the standpoint of tools, the potter's kiln and art were necessary steps to metals, for a modification of the kiln probably provided the high temperatures ..."

A fanciful depiction of early civilized life in the Assyrian city of Nimrud ca. 1350 BCE.
From Myths and Legends of Babylonia & Assyria by Lewis Spence, 1910.

THE NEOLITHIC GIANT LEAP

For two to three million years, hominins had lived as nomadic hunter-gatherers in small bands of 100 at most. (Birch-Chapman et al., Estimating population size, density and dynamics of Pre-Pottery Neolithic villages...)

We also know from contemporary hunter-gatherers that when food was found it was eaten immediately and saving food for times of scarcity did not happen. 

"Hunter-gatherers have little or no stored food, and no concentrated food sources, like an orchard or a herd of cows: they live off the wild plants and animals they obtain each day." (Diamond, The Worst Mistake...)

But in a relatively short period of time -- about ten to twenty thousand years -- some nomadic hunter-gatherers adopted a sedentary way of life where they lived in villages with many hundreds of people and grew crops. And this was revolutionary. But as I continued to study, I realized that it was much more. It was a giant cognitive leap, it was a major breakthrough in human understanding.

While there are many aspects to this cognitive leap, I would suggest the principal one was a new understanding of time.

Life as hunter-gatherers was immediate and of the moment. Life as Neolithic farmers was quite different. It required an understanding of the yearly cycle of seasons and also how to plant, grow, harvest, process, and store grains at just the right times and in the right way which involved planning and preparation.

However, I believe these Neolithic cultures also saw 'big time' or cosmological time as cyclical. Sunrise to sunset, the phases of the moon, winter, spring, summer, fall, birth, and death were all cyclical. But within those cycles humans could work with linear time.

For Neolithic people, there were plenty of examples of linear time within cyclical time. The seasons occurred in the same order every year. In early spring seeds were planted which then sprouted and grew through the summer and then were harvested in the fall. Agriculture was a process that had to be done in sequence. This was both a linear progression and also a cycle that repeated itself year after year. Preparing the soil, planting and harvesting had to be done in the correct order and at the right times to ensure a bountiful harvest.

Once Neolithic cultures grasped how linear time functioned within cyclical time, it opened the door to an understanding of processes in general which created a wide variety of new tools and products and also gave people a new control over the environment.

Neolithic time marked the beginning of our modern concept of time, of long-term linear time, time that is conceptualized as something that can be controlled. Time could now be planned or managed or used as a resource. Time did not just flow uncontrollably, it could be harnessed and used to human advantage.

NEOLITHIC TIME CONCEPTS

We do not know any Neolithic languages because writing had not been invented. Nevertheless, we can infer a significant amount of information about the Neolithic ability to work with time from their technology. 

We know, for example, that with agriculture they wisely focused on grain crops, which they learned how to harvest and then place in long-term storage which became insurance against droughts and famines. But that was just the start. They learned to domesticate these crops so that their yield increased substantially. In addition, they chose crops whose seeds remained on the stems -- which was a mutation but which was useful because it made harvesting much easier; it was an aberration that humans wisely took advantage of because normally plants allowed seeds to blow and scatter so they could grow in the wild.
"Domestication is the process by which farmers select for desirable traits by breeding successive generations of a plant or animal. Over time, a domestic species becomes different from its wild relative.
 "Neolithic farmers selected for crops that harvested easily. Wild wheat, for instance, falls to the ground and shatters when it is ripe. Early humans bred for wheat that stayed on the stem for easier harvesting." (History.com, Neolithic Revolution: Plant domestication)
From the above and other technological innovations (more next), we can surmise that Neolithic cultures had a complete toolbox of shared linear time concepts that allowed them to plan, coordinate and work together for short-term, medium-term, and long-term goals. And judging from all other languages, many of these concepts were probably expressed in words.

"Time reference is a universal property of language..."
Jacqueline Lecarme, Ph.D., Linguistics 
(Lecarme, Nominal Tense and Tense Theory)

These concepts would also have made it possible for them to develop and refine processes. Processes such as making cloth from flax or pottery from clay required a number of specific steps in sequence so an understanding of linear time was key. 

I believe this understanding of processes had been developing for hundreds of thousands of years, but with the Neolithic era, there was a flowering of knowledge, understanding, skill, technology, and careful observation. Because it was at this point that technology reached a kind of critical mass in which very new things were possible. Some techniques or processes were so useful and so well thought out, that they are still used today or until recently. I describe some of these later in this article.

ABOUT ANIMAL TIME, PALEOLITHIC TIME, AND NEOLITHIC TIME

It is my contention that early humans, i.e., hominins, slowly emerged from their animal sense of immediate time to gasp a new sense of linear time that had a past, present, future, and duration. It may have taken millions of years but by the Upper Paleolithic, I believe Homo sapiens had a fully developed sense of linear time but still saw time as being primarily immediate. This could be called 'short-term ' linear time. By this, I mean that Upper Paleolithic people could plan to make sophisticated bows and arrows with a variety of materials or plan a group hunt of migrating animals, but understanding linear time as it related to seasons or the yearly cycle was not part of their mindset.

There is one clear example of this in the time concepts of the nomadic hunter-gatherer Piraha tribe in the Amazon.

A Piraha community. The Pirahas are hunter-gatherers who live in the Amazon.

The Piraha tribe in the Amazon adheres to an Immediacy of Experience Principle according to linguist Dr. Daniel Everett. Their time frame and concepts are built around the moment. This is integral to their language but also to their culture and their technology. When he asked them what the Amazon jungle was like thousands of years ago, they said it had always been the way it is now -- not believing in any long-term past. The culture rejected any mention of time beyond the Piraha's accepted concepts and this was part of their technology -- as they were not interested in expanding their skills to include longer planning. (Colapinto, Has a remote Amazonian tribe upended our understanding...)

The Neolithic sense of time was quite different. Neolithic cultures understood long-term linear time within the context of yearly cyclical time. In other words, a long-term sense of time was essential to the Neolithic way of life because it was necessary for an understanding of the seasons and agriculture. This sense of time also played a part in their ability to work with and improve a variety of processes such as pottery, weaving, and tool-making that were time-consuming and required a number of steps in sequence.

The most dramatic and clear-cut example of the difference between a nomadic hunter-gatherer lifestyle and that of the Neolithic is shown in the way each group handled food. For the Piraha mentioned above, food is consumed immediately and there is no thought about planning. 

The Piraha eat what they catch in the river and gather in the jungle and are quite good at doing this on a day-to-day basis. While they could preserve food for future use, Dr. Everett found they were not interested, even though there were days when they went hungry. (Colapinto, Has a remote Amazonian tribe upended our understanding...)

Neolithic societies, however, spent considerable thought and effort on creating storage systems so that they would have food for the long term. The following describes examples of storage designs.
"The granaries represent a critical evolutionary shift in the relationship between people and plant foods...The transition from economic systems based on collecting and foraging of wild food resources before this point to cultivation...[of] managed resources in the PPNA (Pre-Pottery Neolithic) illustrates a major intensification of human-plant relationships.
"People in the PPNA were the first in the world to develop systematic large-scale food storage.
"All of the granaries [ED: found in this study] were circular structures ˜3 × 3 m on the outside and were built with suspended floors for air circulation and protection from rodents and insects." (Kuijt & Finlayson, Evidence for food storage and predomestication granaries 11,000 years ago...)

"In the... Neolithic periods, hermetic storage was used in the form of underground pits. Found in the Middle East as well as in Europe, these pits were used to store dried food.
"Simply put, hermetic storage has a gas-tight and moisture-tight environment that kills off insects and inhibits mold growth." (GrainPro, A Brief History Of Hermetic Storage)

 An Example Of A Long-Term  Process

Weaving is a good example of a long-term process that began in the Neolithic era. First flax had to be carefully planted and harvested, next there were complicated procedures to extract fiber from the flax plant, then the fiber had to be spun into thread and finally woven on a Neolithic loom. The last step was to cut and sew the cloth to make a garment. 

Click on the next link to see detailed descriptions of the 12 steps that are typically involved in the process of making linen from flax. 
From Flax to Linen: https://ulsterlinen.com/flax-to-linen/


EVIDENCE FOR AN UNDERSTANDING OF YEARLY TIME

The Importance Of The Winter Solstice To Neolithic Societies

Today it is hard for us to understand the importance of knowing the time of the winter solstice when the solstice occurs. Having such knowledge allowed Neolithic people to be in touch with the precise cyclical nature of reality and also yearly time and the beginning of a new year.

But even when carefully observed, the math involved with a yearly repeating calendar was daunting, especially since a year is not an even number (roughly 365 1/4 days) and the moon phases do not stay in sync with the sun's yearly cycle. Thousands of years later classical societies, such as Rome, struggled with this problem for centuries causing the calendar to be off a large number of days. This continued until the Julian calendar was adopted.

Knowing the sequence for days and months was easily calculated using the phases of the moon. But the moon's cycles and the sun's yearly cycle did not match. So Neolithic societies needed to find a way to make sure that these cycles worked together.


Each year the calendar had to be reset so that farmers knew the sequence of  the moon's phases in relation to the sun's yearly cycle. Otherwise using only a lunar calendar could cause major miscalculations. In an agricultural society, this would be crucial. 

Aubrey Burls & Clive Ruggles (two of the most respected authorities) agree that a "concern with the moon...is ‘significant’, (i.e. cannot be coincidental) is widespread and is a feature of Early Neolithic sites."
(Mercer, Background notes to Neolithic cosmology)

The Neolithic  'calendar' in general was the sun and the moon and the stars. Time was indicated by the change in these cycles. Understanding these cycles was crucial for understanding the passage of time.

So what the Neolithic people did was not only smart it was brilliant and a cognitive leap. 

They realized that knowing when the winter solstice occurred would allow them to reset the year's calculations and bring their timekeeping into line. However, the winter solstice is very difficult to determine as the lengths of the days around the solstice only vary by a few seconds and the angle of the sun on the horizon hardly varies at all. Moreover, the sun rises later each day after the solstice for about two weeks, which must have been confusing. 

Chart of December sunrise times and day lengths in Dublin Ireland in 2021
(close to Newgrange) around the time of the solstice.
This chart is derived from information at the following website:

The Neolithic societies had to create a way to determine the day of the solstice or the time period around the solstice. So many of them created a kind of 'instrument' that was sensitive to the angle of sunlight. When the time around the solstice occurred, the sun would light up a narrow opening.

The passageway at Newgrange allows sunlight to enter it only during the time of the solstice.
Coffey, George. Drawings of Newgrange from the late 1800s. Published in: The Dolmens of Ireland,, by William Copeland Borlase. Published by the University of Michigan Library (January 1, 1897).

The passage tomb at Newgrange in Ireland is the most dramatic example of this capability because its passageway allows light to enter the monument only during 5 days around the time of the solstice and it may even be able to determine the day of the solstice in real-time, although this has not yet been confirmed. 

LEFT: "A section of the passage leading towards the chamber
of the Newgrange passage tomb in Ireland."
RIGHT: The light of the solstice in the passageway in 2013.

But it is now clear that generally speaking, this was a widely known Neolithic skill. For example, more than a hundred Neolithic 'circular enclosures' have been discovered in Northern Europe and many were designed to determine the time around the winter solstice. These have only just been discovered in the last thirty years from post-hole patterns. 
(Neolithic Circular Enclosures in Europe)

For example, in 1991 the 'Goseck Circle' in Germany (4,900 BCE - 4,700 BCE) was discovered with areal photography that revealed a pattern of post holes. It was a kind of wooden stone henge. The Goseck Circle had narrow openings that were aligned with the sunrise and sunset of the winter solstice. 

LEFT: Goseck Circle.
MIDDLE: A diagram showing how the solstice sunrise and sunset entered the openings in the Goseck circle.
RIGHT: An interior shot of the Goseck circle recreation.

Archaeologist Ralf Schwarz believes that the construction of the site made it possible to coordinate the lunar phases with the more difficult measurements of the solar cycle.
(Schwarz, Neolithic Circular Enclosures in Europe)

On the island of Malta the Neolithic temple, Mnajdra, (c.3600 BC – c.3200 BC) is aligned with the summer and winter solstices and also to the equinoxes. It is like a yearly 'clock' because the time of year can be read each morning by the position of the sun's rays on the stone. 


 Writing about Neolithic monuments and megaliths, Michael Gantley of National Geographic wrote,
"The incorporation of astronomical alignments suggests that Neolithic ceremonies were closely bound with the changing seasons. These cycles were critical to agrarian communities..."
(Gantley, Europe’s Mighty Megaliths "Rock" the Winter Solstice)


ABOUT THE NEOLITHIC TIME PERIOD

While scholars refer to the Neolithic time period, the start and end vary considerably depending on the location and the materials that were available. About 10,000 years ago some of the first Neolithic cultures came about in the Middle East; they made many of their items with reeds. Around three thousand years later, the Neolithic emerged in Europe with wood being a major material.

In addition, there was a transitional time period called the Mesolithic which occurred between the Upper Paleolithic and the Neolithic. During this time nomadic tribes often settled into one place for several months during the year. Like the Neolithic, the Mesolithic time period and nature of the transition varied considerably.


SPIRALS AS SYMBOLS FOR LIFE CYCLES

LEFT: Ancient Greek Pottery: Greek Prehistory Gallery, National Museum of Archaeology, Athens, Greece.
RIGHT: Romanian pottery, 5th millennium BCE. Museum of Prehistory and Early History, Berlin. 

Drawings and images of spirals occur throughout Neolithic societies. The most famous, the triple spiral, was found in the monument at Newgrange Ireland. But these images appear in most Neolithic cultures. Many experts today think that these spirals represent the cyclical nature of the year and of reality itself. 


In Ireland, for example, the triple spiral is thought of as a symbol for the universal cycles of life.

"The triple spiral is thought to represent Birth, Life, and Death, or Man, Woman, and Child, signifying the unending cycle of life"
"This close pattern of spirals is the most common of all motifs decorating Celtic tombs, and one that is basic to all Celtic art."
(Irish Traditions, The Spirals of Newgrange)

TOP: The large stone at the entrance to Newgrange
BOTTOM: A drawing of the large stone showing the spiral engravings.
Coffey, George. Drawings of Newgrange from the late 1800s. Published in: The Dolmens of Ireland,, by William Copeland Borlase. Published by the University of Michigan Library (January 1, 1897).

The following quote is consistent with my ideas about Neolithic time being long-term, unlike Paleolithic time which was immediate. If spiral images did represent yearly cyclical time, it is significant that these symbols did not take hold until the Neolithic.

"The spiral motif is rare in European rock art sites from the Upper Palaeolithic [approximately 40,000 to 12,000 years ago]. According to Genevieve Von Petzinger, it is strange that it is not present more often considering...how central this motif becomes in later time periods...The spiral does not become a regular occurrence in Europe until after the Upper Palaeolithic."
(Bradshaw Foundation, Ancient Symbols in Rock Art: The 'Spiral')

______________________________________________
THE NEOLITHIC ABILITY TO 
WORK WITH COMPLEX PROCESSES

Building on the experiences of the Paleolithic era, Neolithic societies had an in-depth knowledge of the properties of plants, animals, and minerals. With plants, for example, this knowledge not only included the composition of the vegetation but also its cycle -- as some qualities were only present at certain seasonal points. And they were skilled at developing and refining processes to suit their needs. They knew, for example, that properties could be altered through processes such as heating clay to a high temperature to make pottery.

POTTERY (NEOLITHIC)

The ability to make successful pottery was "linked to improved skills in pyrotechnology (firing at the correct temperature) and was finally gratified during the Neolithic Period.
"Pottery art is a complex and time-consuming process that presupposes a knowledge of all its stages: choice of suitable clay, removal of impurities (manually or by sieving) and clay preparation...and firing at a temperature up to 850-900 Celsius (1562-1652 Fahrenheit)"
(Hellenic Foundation, Neolithic Pottery)

LEFT: Cucuteni (a Neolithic Culture) kiln reconstruction, Cucuteni Neolithic Art Museum, Piatra Neamt, Romania.
RIGHT: Pottery, Neolithic, the Cucuteni Culture, 4300-4000 BCE. Found in Scânteia, Iasi, Romania. Collected by the Moldavia National Museum Complex.


5,000 YEARS OF MAKING LINEN: THE HISTORY OF NEOLITHIC FLAX PROCESSING

"Archaeobotanists Ursula Maier and Helmut Schlichtherle reported evidence of the technological development of making cloth from the flax plant (called linen). [ED: during the Neolithic]
"Making cloth from flax is not a straightforward process.
"Flax is a bast fiber plant--meaning the fiber is collected from the inner bark of the plant--which must undergo a complex set of processes to separate the fiber from the woodier outer parts.
"They report that evidence for Alpine lake house [Neolithic] flax fiber production includes tools (spindles, spindle whorls, hatchets), finished products (nets, textiles, fabrics, even shoes, and hats)...They discovered, amazingly enough, that flax production techniques at these ancient sites were not dissimilar from that used everywhere in the world through the early 20th century."
(Hirst, 5,000 Years of Making Linen)

LEFT: Woman's linen dress, Smolensk Linen museum, Smolensk, Russia.
RIGHT: Man's outfit, Smolensk Linen museum, Smolensk, Russia.

-----------------------
THINKING BIG
One of the characteristics of the Neolithic era was that they could 'think big'. So basic basket weaving technology could be used to make small reed boats and then very large boats, for example, as described next. And that same basket weaving technology could be used to make small reed huts for a family and then very large buildings for a community.
-----------------------

THE NEOLITHIC ORIGINS OF SEAFARING IN THE ARABIAN GULF

"Navigation in the Gulf during the Neolithic and Ubaid periods 
"The new discoveries...allow us to speculate on the mechanics of trade during the sixth and fifth millennia BC. First, the question of whether boats were used during the Neolithic period has been answered positively. The vessels were made of reed bundles, lashed together, and then coated with a bitumen amalgam – a technology that prefigures the techniques used to build trading vessels during the Bronze Age, some 3000 years later."
(Carter, Neolithic origins of seafaring in the Arabian Gulf)

While this large reed boat would have been constructed for a post-Neolithic Mesopotamian civilization, smaller ships with this general design were used in the Neolithic.
LINK

BITUMEN

"Analysis of the material from Ras al-Jinz has shown that the bitumen was combined with chopped reeds, carbonates, and possibly fish oil, to make an amalgam. This process changed the physical properties of the bitumen, making it adhesive, tough, flexible, and light." [ED: This shows that during the Neolithic era, an understanding of materials and their properties was quite advanced.]
(Carter, Neolithic origins of seafaring in the Arabian Gulf)


MUDHIF

"A mudhif, a traditional Marsh Arab guesthouse made entirely out of reeds.
The Marsh Arab live a lifestyle that dates back 5,000 years." 
(U.S. Army Corps of Engineers, A mudhif) 
LEFT: "The village headmans house, people of the marshes 1978."
RIGHT: Mudhif Reception Hall.

NEOLITHIC (NEW STONE AGE) TOOLS WERE A MAJOR ADVANCE OVER OLD STONE AGE TOOLS

When I was in college I asked my Modern Civilization professor what was the reason for polished stone tools in the Neolithic era, the technology that defined the era and gave it its name, the New Stone Age. He did not have an answer. I asked another knowledgeable person several years ago and they did not know either. Clearly, this has not been understood until recently when some archaeologists used such tools to cut down a few trees and, as a result, began to see their value. These tools were not just somewhat advanced; they worked very differently and effectively. For example, they chopped down trees quickly and the tools remained sharp. They also worked well when it came to carving and shaping wood to make a variety of items. But dismissing these tools as merely a slight advance in stone tool technology was a mistake and was one of the reasons why the New Stone Age has not been given its due.

LEFT: Paleolithic 'flake tools'.
RICHT: Neolithic polished tools.
Page 280, Volume 15 of the German illustrated encyclopedia Meyers Konversationslexikon, 4th edition (1885-1890).

"The Neolithic Period, or New Stone Age, the age of the ground tool, is defined by the advent around 7000 BCE of ground and polished celts (ax and adz heads) as well as similarly treated chisels and gouges...A ground tool is one that was chipped to rough shape in the old manner and then rubbed on or with a coarse abrasive rock to remove the chip scars...Polishing was a last step, a final grinding with fine abrasive. That such a tool is pleasing to the eye is incidental; the real worth of the smoothing lay in the even cutting edge, superior strength, and better handling. The new ax would sink deeper for a given blow while delivering a clean and broad cut; its smooth bit, more shock resistant than the former flaked edge, had less tendency to wedge in a cut."
(Britannica, Neolithic Tools)

Read the excellent complete detailed 
but concise Britannica articles
about Neolithic hand tools
And the Neolithic Era in Europe


"A Neolithic stone axe with a wooden handle. Found at Ehenside Tarn, now in the British Museum."

"The polished Neolithic ax, a heavy implement, was in sharp contrast to the delicate small-rock work of the last stages of the Paleolithic period.
"In a revealing experiment, 4,000-year-old polished rock axes, furnished by the Danish National Museum and carrying the sharpness left after their last use 4,000 years ago, were fitted with ash handles modeled after that of a Neolithic hafted ax preserved in a bog, giving the ax an overall length of nearly 63 cm (25 inches). (A modern steel felling ax has a 91-cm [36-inch] handle.) When these were used in a Danish forest, it was soon found that the violent action of the modern technique of swinging a steel ax and putting shoulder and weight behind the blade to give long and powerful blows was disastrous, either ruining the edge or breaking the blade. Proper handling meant short quick strokes that chipped at the tree...
"After getting into form, the men found it possible to fell an oak tree more than 0.3 metre (1 foot) in diameter in half an hour or a pine 61 cm (2 feet) in diameter in less than 20 minutes. One-eighth acre (600 square yards, or 0.05 hectare) of silver birch forest were cleared by three men in four hours. One axhead cut down more than 100 trees on its original (old) sharpening."
(Britannica, Neolithic Tools)


WOOD TECHNOLOGY BEGAN AS A RESULT OF NEOLITHIC TOOLS

A Neolithic hut at the archeoParc in Schnals, South Tyrol, Italy.

"Wood began its broad role in human life with the ground and polished tools of the Neolithic. Home and fire, furniture and utensils, cradle and coffin were products of the ax, adz, and chisel, which could fashion wood intricately and with precision. This kit of tools turned wood into an almost universal building material, for a host of new things was now possible, such as dugout canoes of oak, paddles and framing for hide-covered boats, sledges, skis, wooden platters and ladles, as well as other household gear."
(Britannica, Neolithic Tools)

Reconstructed Neolithic longhouse in the Archaeological Open-Air Museum in Oerlinghausen, Germany.


NEOLITHIC SHOES (OF OTZI THE ICEMAN)

The discovery of a ca. 5000-year-old (between 3400 and 3100 BCE) natural mummy called Otzi the Iceman, who was found frozen in the Alps, uncovered a wide range of new information about Neolithic technology. He was discovered in 1991 and is part of the current rethinking about the sophistication of the Neolithic time period. His equipment and shoes, for example, showed that Neolithic people used natural materials in an extremely complex way. They understood animal, plant, and mineral properties and often combined them for maximum effect. But they also understood design, as Otzi's shoes were practical and comfortable.

His well-preserved shoes, scientists discovered were carefully made of different skins and fibers, each used for its particular qualities. "Microscopic studies of the leather showed that it came from calf on the bindings, deerskin on the uppers, and bearskin on the soles. Following the boot’s structure, the researchers re-created a net made of thin bark strips and stuffed it with hay, which formed a lining that kept the foot warm and cozy." Then according to Hlavacek, a bootmaker who walked in the Alps in these reconstructed shoes, "these boots offered more contact with the ground’s surface than modern shoes and felt like 'walking barefoot, but only better.'" 
(Origjanska, Expert re-creates the shoes of 5,300-year-old Ötzi the Iceman)

Reconstruction of the Ötzi shoes by Anne Reichart.
"The inner braid is made of twisted and twisted cords made of linden bast, the outer shoes made of deerskin with bearskin soles. An insulating layer of dry grass is held in place around the shoe by an inner mesh made of twisted and twisted linden bast cords." (Reichert, wikipedia.org) 

THE LASTING LEGACY OF THE NEOLITHIC ERA

Many important industries and practices began in the Neolithic and continue until today or until recently. This not only demonstrates their skill but their ability to create and craft important long-lasting processes.

WEAVING

Weaving basics remain essentially the same after its invention in the Neolithic.

LEFT: Reconstruction of a Neolithic loom around the time that Otzi, the Neolithic frozen 'ice man', was alive (ca. 3300 BCE), archeoParc in Schnals, South Tyrol, Italy. 
RIGHT: Clothing woven by this loom, archeoParc in Schnals, South Tyrol, Italy.


The famous Anni Albers of the Bauhaus School had this to say.
"During the 4,500 years or, in some estimates, even 8,000 years that we believe mankind has been weaving, the process itself has been unaffected by the various devices that contributed to greater speed of execution. We still deal in weaving, as at the time of its beginning, with a rigid set of parallel threads in tension and a mobile one that transverses it at right-angles."
This basic insight about right-angles has never been overshadowed. Anni Albers went on to say, "And weaving, even the most elaborate, can be done, given time, with a minimum of equipment...Fabrics of great accuracy have been executed without much mechanical aid."
(Albers, On Weaving)


WARP-WEIGHTED LOOM

Reconstruction of Neolithic warp-weighted loom
at the National Museum of Textile Industry in Sliven, Bulgaria.

Warp-weighted loom: Some of the Neolithic-type looms were still being used up until about 50 years ago in Scandinavia.


FOUNDER CROPS AND THE ORIGINS OF AGRICULTURE

Many core crops of the Neolithic are still important today.

NOTE: While einkorn wheat and emmer wheat are not grown as much today as they used to, they were major crops until recently. But five of these founder crops are still widely consumed today.

"The Eight Founder Crops, according to long-standing archaeological theory, are eight plants that form the basis of origins of agriculture on our planet. All eight arose in the Fertile Crescent region (what is today southern Syria, Jordan, Israel, Palestine, Turkey and the Zagros foothills in Iran) during the Pre-Pottery Neolithic period some 11,000–10,000 years ago. The eight include three cereals (einkorn wheat, emmer wheat, and barley); four legumes (lentil, pea, chickpea, and bitter vetch); and one oil and fiber crop (flax or linseed).
These crops could all be classed as grains, and they share common characteristics: they are all annual, self-pollinating, native to the Fertile Crescent, and inter-fertile within each crop and between the crops and their wild forms."
(Hirst, The Eight Founder Crops)


POTTERY

Based on detailed information from the visual-arts-cork.com pottery timeline, virtually all pottery/ceramics fundamentals had been invented in the Neolithic, including tourneys/tournettes which were early potter's wheels (4700 BCE). 
(Visual-Arts-Cork, Pottery Timeline)


CORACLE BOATS

Still widely used today in the Middle East and in Asia, the coracle was a boat of the Neolithic era.

LEFT: Small coracles are still widely used throughout the world.
RIGHT: A coracle can be quite large and carry over 10 tons.


"Neolithic navigation: The coracle was surely used for fishing, hunting, and commercial activities."
(Ancient-Cities, Neolithic navigation: The coracle)

The Use Of Stone Tools Continued For Thousands Of Years
And Was Not Quickly Replaced By Metal Tools

"Stone tools maintained themselves during the Metal Age, yielding only slowly to the new material, which was expensive and the product of special skills. The copper and bronze tools and weapons... that constitute impressive displays in museums were rare luxuries. "
(Britannica, Neolithic Tools)

CONCLUSION

For this article, I chose a range of technologies that showed how the Neolithic cultures met basic needs, those of food, clothing, and shelter plus tool and utensil making. 

While I spent a good deal of time detailing how these cultures developed and used these technologies, my main point is the following. They could not have done any of this without a clear understanding of long-term linear time. Their way of life and their processes required long-term linear thinking. Their technology could not have been accomplished otherwise.

So I believe that by going into detail I have shown that they must have possessed this new sense of time. And this new sense was quite different from the immediacy of the Paleolithic era. It was a game-changer. I think they believed that cosmological time was cyclical, but season to season time was linear and that within the cycle of yearly time, long-term linear time was how the world operated.

Understanding this meant that humans had a new productivity tool. Learning to work with extended linear time and plan long-term gave them a power that they never had before. 

Neolithic long-term linear time was a concept that was similar to our own. And this was a radical break with earlier conceptions of time. The main difference between modern time and Neolithic time is that Neolithic cultures saw overall time, cosmological time, as being cyclical. But now in the modern world, we see all time as being linear -- starting with the Big Bang 13.8 billion years ago.

Yet the basic idea of long-term linear time began in the Neolithic. Instead of seeing time as a flow over which they had no control, time was now seen as something that could be understood and used to human advantage; it could be harnessed. Time was now seen as a commodity, a resource that could be tamed and domesticated, just like the crops and the farm animals.

And this new conception of time was a giant cognitive leap for mankind. 

"Whether a temple or a grave, ancient people often brought their mundane activities into cosmic synchrony - a cadence of time and space frozen into stone."
(NASA, Designing Your Own Newgrange Tomb!)


__________________________
AFTERWORD

Long-lasting Neolithic designs

LEFT: A reconstruction of a Neolithic building
"The Stone Age Horton House as constructed at Butser Ancient Farm 2020." Petersfield, England.
RIGHT: Making a modern thatched roof today.




Flip-flops: A Neolithic design that is still widely used today.
LEFT: A pair of 'flip-flop' sandals from the Middle Neolithic (5200 and 4800 BCE), Cueva de Los Murciélagos, Albuñol (Province of Granada, Andalusia, Spain).
MIDDLE: Ancient Egyptian flip-flops, circa 1580 –1479 BCE, Metropolitan Museum of Art.
RIGHT: Children's flip-flops, 1960, Museum Rotterdam, Rotterdam, the Netherlands.

______________________________________
ENDNOTES

Albers, Anni. On Weaving: New Expanded Edition. Princeton University Press, Oct 24, 2017, page 4.

Ancient-Cities forum. Plinio.Lisboa: "The coracle was surely used for fishing, hunting, commercial activities." Forum.Ancient-Cities.Com, Nov '18. https://forum.ancient-cities.com/t/neolithic-navigation/4942

Birch-Chapman, Shannon; Jenkins, Emma; et al. (2017) "Estimating population size, density and dynamics of Pre-Pottery Neolithic villages in the central and southern Levant: an analysis of Beidha, southern Jordan, Levant." The Journal of the Council for British Research in the Levant, Volume 49, 2017 - Issue 1. https://www.tandfonline.com/doi/full/10.1080/00758914.2017.1287813

Bradshaw Foundation. "Ancient Symbols in Rock Art: The 'Spiral'." https://www.bradshawfoundation.com/ancient_symbols_in_rock_art/ancient_symbols_in_rock_art.php

Britannica. "Neolithic Tools." Britannica.com. https://www.britannica.com/technology/hand-tool/Neolithic-tools

Carter, R.A. "Neolithic origins of seafaring in the Arabian Gulf." Archaeology International, 2912. pp 44-47. DOI: http://dx.doi.org/10.5334/ai.0613

Colapinto, John. "Has a remote Amazonian tribe upended our understanding of language?" The New Yorker Magazine, April 16, 2007. https://www.newyorker.com/magazine/2007/04/16/the-interpreter-2

Diamond, Jared, UCLA School of Medicine. "The Worst Mistake in the History of the Human Race" Discover Magazine, May 1987, pp. 64—66.

Gantley, Michael J. "Europe’s Mighty Megaliths 'Rock' the Winter Solstice." National Geographic, November 12, 2017. https://www.nationalgeographic.com/history/history-magazine/article/history-europe-megaliths-solstice

GrainPro. "A Brief History Of Hermetic Storage." Grainpro.com. https://news.grainpro.com/a-brief-history-of-hermetic-storage

Hellenic Foundation, Greece. "Neolithic Pottery." http://ime.gr/chronos/01/en/nl/culture/nl_pottery.html

Hirst, K. Kris. "5,000 Years of Making Linen: The History of Neolithic Flax Processing." Thoughtco.com, May 20, 2019. https://www.thoughtco.com/making-linen-history-neolithic-flax-processing-171347

Hirst, K. Kris. "The Eight Founder Crops and the Origins of Agriculture Re-imagining the Beginning of Farming." Thoughtco.com, updated August 31, 2018. https://www.thoughtco.com/founder-crops-origins-of-agriculture-171203

History.com. Neolithic Revolution: Plant domestication. History.com Editors, Updated Aug. 23, 2019.

Irish Traditions. "The Spirals of Newgrange." Irishtraditionsonline.com, 2016. https://irishtraditionsonline.com/the-spirals-of-newgrange/

Kuijt, Ian & Finlayson, Bill. "Evidence for food storage and predomestication granaries 11,000 years ago in the Jordan Valley." Pnas.org. July 7, 2009. https://www.pnas.org/doi/full/10.1073/pnas.0812764106 https://doi.org/10.1073/pnas.0812764106

Lecarme, Jacqueline, Ph.D., Linguistics. "Nominal Tense and Tense Theory." Empirical issues in formal syntax and semantics, 1999. https://www.academia.edu/2486019/Nominal_Tense_and_Tense_Theory

Lusk, Jayson. "The Evolution of American Agriculture." Jaysonlusk.com, June 27, 2016. http://jaysonlusk.com/blog/2016/6/26/the-evolution-of-american-agriculture

Mercer, R. "Background notes to Neolithic cosmology." 2014 ScARF Downloads. https://scarf.scot/wp-content/uploads/sites/15/2014/02/Mercer_cosmology_2014_0.pdf 

NASA. "Designing Your Own Newgrange Tomb!" P8Newgrange.pdf, p.1. http://spacemath.gsfc.nasa.gov/SED11/P8Newgrange.pdf

Neolithic Circular Enclosures in Europe, International Workshop in Goseck (Saxony-Anhalt, Germany) 7.-9. Mai 2004 (abstracts).

Origjanska, Magda. "Expert re-creates the shoes of 5,300-year-old Ötzi the Iceman, down to the bearskin soles and hay-stuffed lining." Thevintagenews.com, Dec 12, 2017. https://www.thevintagenews.com/2017/12/12/otzi-the-iceman-shoes/

Schwarz, Ralf. "Neolithic Circular Enclosures in Europe. Circular ditch systems of the Stichbandkeramik culture in Saxony-Anhalt." (Kreisgrabenanlagen der Stichbandkeramikkultur in Sachsen-Anhalt.) International Workshop in Goseck (Saxony-Anhalt, Germany) 7-9 May 2004.

U.S. Army Corps of Engineers Digital Visual Library. "A mudhif, a traditional Marsh Arab guesthouse made entirely out of reeds."  https://commons.wikimedia.org/wiki/File:Iraqi_mudhif_interior.jpg

Visual-Arts-Cork. "Pottery Timeline (c.26,000 BCE - 1900)." Encyclopedia Of Art. http://www.visual-arts-cork.com/pottery-timeline.htm



Monday, April 25, 2022

Neolithic Science: A Camera Obscura Project

Neolithic Science:
A Student Hands-On Project

How To Build a Large Portable Pinhole Camera or Camera Obscura to Explore How Neolithic Optics at Newgrange Were Able To Accurately Determine the Time of the Winter Solstice

The solar eclipse of January 24, 1544, seen in a camera obscura building.
"First published picture of camera obscura in Gemma Frisius' 1545 book De Radio Astronomica et Geometrica."

ABSTRACT
This article explains how to build and experiment with a room-sized, but inexpensive, camera obscura which would have been possible in the Neolithic era.
This how-to article explains how a pinhole camera or camera obscura arrangement could have been possible in the Neolithic era which could have been used to measure the sun's position at the time of the winter solstice in real-time and by direct observation. This article describes how students or others could inexpensively make a large room-sized camera and configure it so that it magnifies or enhances the image of the sun. With a basic prehistoric optical device, the very difficult measurement of the position of the sun during the winter so1tice might have been determined. This determination was so difficult the Romans could not do it with direct observation 3000 years later and often made mistakes even when using other methods. 


INTRODUCTION

“In the case of Neolithic astronomy,
we are dealing not with the prehistory of science,
but with science in prehistory.”
(McClellan et al., Science and Technology in World History)

This article explains how to build and experiment with a room-sized, but inexpensive, camera obscura which would have been possible in the Neolithic era.

This how-to article explains how a pinhole camera or camera obscura arrangement could have been possible in the Neolithic era which could have been used to measure the sun's position at the time of the winter solstice in real-time and by direct observation. 

This article then describes how students or others could inexpensively make a large room-sized camera and configure it so that it magnifies or enhances the image of the sun. With a basic prehistoric optical device, the very difficult measurement of the position of the sun during the winter so1tice might have been possible. This determination was so difficult the Romans could not do it with direct observation 3000 years later and often made mistakes even when using other methods. 

THE PROBLEM WITH MEASURING THE SUN'S POSITION AROUND THE TIME OF THE WINTER SOLSTICE

The problem with measuring the sun's position at the time of the winter solstice is very simple, in a way. For about five days or about two days before and two days after the day of the winter solstice, the sun's declination (the sun's angle) hardly moves. And the movement is so slight that any attempt to measure it is made even more difficult due to atmospheric refraction and atmospheric conditions.

To be specific "the diameter of the sun is 0.5 degrees which is 30 arcminutes or 1800 arcseconds." according to NASA and the sun moves less than 30 arcseconds a day around the time of the solstice or 1/60 of the diameter width of the sun (1800/30 = 60). [See 'Summary Of Numbers' below for references.]

And to make things even more complicated sunrise occurs later after the solstice not earlier. However, the days are longer, meaning that the sunset is later. But the sun continues to rise later for about two weeks even though the days are lengthening.

The modern word 'solstice' comes from Latin. Sol = sun; sistere = to stand still. So solstice means the standstill of the sun which is how it appeared to the Romans. 

Nevertheless, the Neolithic astronomers at Newgrange were able to detect the slight movement and build a huge monument that revealed this movement.

But 3000 years later the Greeks and Romans could not determine the day of the solstice by direct observation in real-time. Moreover, the Romans made a number of miscalculations and mistakes even using other methods.
It is clear from practical considerations that no one could have reliably and routinely simply noted the moment when the Sun’s declination was at a given value: ±23;43° for a solstice.
(Duke, Ancient Astronomy - Lecture 2)

Accounts do not survive but Greek astronomers must have used an approximation method based on interpolation... This method consists of recording the declination angle at noon during some days before and after the solstice, trying to find two separate days with the same declination. When those two days are found, the halfway time between both noons is estimated solstice time.
(Dokras, Scientific Borobudur)

Some astronomical tables and quotes from Romans show that they often got the date wrong. The summer solstice was just as difficult as the winter solstice to measure.
P. Oxy. LXI.4148 is a [Roman] table of dates of summer solstices over a series of years. The dates are in error by about five days...
(Duke, Ancient Astronomy - Lecture 2)
Numerous Romans thought that the solstice occurred on Christmas day.
In the 5th century, the calendar of Polemius Silvius has an entry for 25 December:
25: Birthday of the Lord in the flesh; solstice and beginning of winter.
(Pearse, Christmas Day On The Winter Solstice)
I have made the following point in other articles. Neolithic people did not create something unless there was a compelling need. The length of a day in Rome at the time of the solstice was an hour and a half longer than at Newgrange so the Romans did not feel the need to be as accurate as the societies around Newgrange. The people at Newgrange needed to know (and probably celebrate) the exact point when the sun ended its travel toward darkness and began its return to light. 


THE PRECISION OF THE ASTRONOMICAL ALIGNMENT AND PASSAGEWAY AT NEWGRANGE

LEFT: Soon after sunrise. Sunrise is the "instant at which the upper edge of the Sun appears over the eastern horizon in the morning."
RIGHT: "A photograph of the entrance to the Newgrange Monument."

The well-respected magazine, Popular Mechanics, had this to say: 

Ireland, 3200 B.C.
On roughly 4 days every year, the winter solstice sun pokes through the top of this Stone Age monument and onto the floor of the interior chamber, filling the ancient temple with light for about 17 minutes. Built before Stonehenge, Newgrange was likely used to track the passing of the years with a PRECISION AHEAD OF ITS TIME. [ED: my emphasis] 
(Newcomb, The World’s 20 Most Impressive Ancient Builds)
The astronomers at Newgrange were able to observe the days around the time of the winter solstice with considerable accuracy because they had created a specially designed 'roof-box' above the passageway which enhanced the light.

LEFT: Close-up of the gate to the passageway (bottom) and the roof-box (top).
RIGHT: Close-up of the roof-box and the funnel stones. The solstice light comes through this roof-box and this opening not through the passageway.
For 17 minutes, therefore, at sunrise on the shortest day of the year, direct sunlight can enter Newgrange, not through the doorway, but through the specially contrived slit that lies under the roof-box at the outer end of the passage roof.
(O'Kelly et al., Newgrange: Archaeology, Art and Legend.)
LEFT: "A section of the passage leading towards the chamber
of the Newgrange passage tomb in Ireland."
RIGHT: The light of the solstice in the passageway in 2013.

 I noticed from my photographs that it [ED: the shaft of light] was in a different position each day. As the solstice approached the beam of light seemed to penetrate further each day, beginning on the left and ending on the right. However after the solstice the beam withdrew from the furthest point of entry and penetrated the central chamber less each day until it eventually failed to enter the central chamber at all.
(O'Brien, Reflections on Loughcrew and Newgrange)

A further study by Tim O'Brien showed that at the time of construction the sun-beam was so accurately framed by the roof-box aperture that Newgrange could be used to determine the exact day of solstice.
(Murphy, Mythical Ireland)

While I agree with Tim O'Brien that the Newgrange setup could determine the day of the winter solstice in real-time, which no other culture could do for about 5000 years, there was even more. The roof-box only allowed light from about Dec. 18 - Dec. 23 to enter the passageway. And on each of these days, the light and timing of the sunrise had a unique signature. This means that if the sky was cloudy, the day of the solstice could still be determined by this unique signature that indicated which day it was around the time of the solstice.

My Thoughts:
Sunrise on the days before the solstice occurred earlier and days after the solstice occurred later. Since these Neolithic scientists were so good at determining the day of the solstice, we can assume that they were skilled in nighttime astronomy as well. The position of the stars at the time of each sunrise around the solstice would have indicated the specific time of each sunrise.

Just how precise was it? Here is what NASA had to say.
"Today the first light enters about four minutes after sunrise, but calculations based on the precession of the Earth show that 5,000 years ago, first light would have entered exactly at sunrise."
(NASA, Designing Your Own Newgrange Tomb!)

 
Coffey, George. Drawings of Newgrange from the late 1800s. Published in: The Dolmens of Ireland,, by William Copeland Borlase. Published by the University of Michigan Library (January 1, 1897).


MAGNIFICATION WAS THE KEY

"Measure what can be measured,
and make measurable what cannot be measured."
Galileo Galilei

The roof-box setup greatly magnified the sunlight and its movement after sunrise. And as we modern people know, magnification can reveal much more detail and information and make distinctions that could not be made without magnification. For example, the sun's light could be seen widening and moving down the passageway in real-time because the sun's motion had been magnified. 

While this kind of magnification is unusual it is not unprecedented.
"The Giant Sundial of Jantar Mantar in Jaipur, India, also known as the Samrat Yantra (The Supreme Instrument), stands 27m tall. Its shadow moves visibly at 1 mm per second, or roughly a hand's breadth (6 cm) every minute." http://en.wikipedia.org/wiki/History_of_sundials 

Chart of December sunrise times and day lengths in Dublin Ireland in 2021
(close to Newgrange) around the time of the solstice.
This chart is derived from information at the following website:

The roof box had two main components. The 'box' was recessed above the passageway. It was set-back with two side walls in front of it, one on each side. These narrow walls served as baffles that restricted sunlight from any time other than the solstice to enter the roof-box. When the solstice light did enter the roof-box it was funneled through a slit that then projected light onto the passageway. When the light was funneled through the roof-box, it was in a sense 'processed' to use the modern idea of processing.
The Importance Of The Roof-Box
The significance of the roof-box as a unique, purpose-built device, constructed during the Neolithic period and designed to admit the light of the rising sun on the winter solstice can hardly be overstated. So far, no comparable feature has been found among the thousands of other megalithic sites across Western Europe.
The form of the roof-box and what was found within it are without doubt the most persuasive evidence we have of the special importance the winter solstice held for Neolithic communities in Ireland.
(Williams, Re-discovering the ‘lost’ records of the Newgrange roof-box.)
When O’Kelly uncovered the structure in its entirety he found that it consisted of a funnel-shaped box, its top made of overlapping slabs and its sides consisting of low dry-stone walls capped by two slabs, one on each wall. It was closed to the rear by the front edge of the second roofslab. Thus he coined the term ‘roof-box’ to describe it. Deep inside the roof-box, a single quartz block was positioned lengthwise along the back edge of the roofslab. 
(Williams, Re-discovering the ‘lost’ records of the Newgrange roof-box.)
I find it very significant that "deep inside the roof-box, a single quartz block was positioned" because quartz is generally transparent or translucent or reflective meaning that it might have acted as a kind of lens or mirror.

"Pure quartz is colorless and transparent or translucent."

A landscape lit by early morning light.
As filmmakers know, the low angled light right after sunrise or just before sunset can reveal fine detail. In movie making it is known as the 'golden hour' for its golden light but also for the richness of detail. This low angle can allow a clear display of patterns in textures, for example, that cannot be seen when the sun is higher up. The same was possibly true in the passageway at Newgrange, when the low-angled early morning light delivered more 'information', to use the modern idea, than later in the day. The long shadows caused by this light also gave more information about the quality of the sunbeam.
https://commons.wikimedia.org/wiki/File:Haltern_am_See,_Westruper_Heide_--_2015_--_8371-5.jpg

NEOLITHIC OPTICS

While there has been much speculation about why this monument was built, there has been very little interest in the science that they used.

"How important it was to the people who visited it and what role exactly it played in ancient spirituality is one of the most highly theorized facts about the monument." (What is Newgrange?)

As the above quote shows, there has been considerable interest in the reasons and the purpose of constructing Newgrange, but I cannot find much information about Neolithic science, even though it is clear that it was performed and it was accurate. 

I am mainly talking about Neolithic optics and their understanding and use of optics. As a result, Neolithic scientists accomplished a number of things at Newgrange. 
  • First: They identified the exact day of the winter solstice. 
  • Second: They built an "instrument" that was perfectly aligned and could ascertain the day of the solstice in real-time. 
  • Third: They built an instrument that processed the light from the sunrises around the time of the solstice and magnified them.
I like to think of Newgrange as the Neolithic equivalent of the Hubble Telescope. They both were precise instruments that took more than a decade to design and build and required hundreds of workers to complete the project.


ABOUT CAMERA OBSCURAS (or pinhole cameras)

How a camera obscura projects an image from the outside.

Long before the invention of photography, in fact, more than 2000 years before, people were aware of a strange phenomenon. When bright light went through a small opening, it projected the scene outside the opening onto a back-surface upside down. 

LEFT: "Numerous displays of a solar eclipse on the ground in the shade of tree leaves, due to the camera obscura effect created by light passing through small gaps between the leaves. The photo was taken during the solar eclipse on October 3, 2005 in Madrid."
RIGHT: Projections of the "sun during a solar eclipse through the leaves of a tree. St. Juliens, Malta"

Aristotle noted the phenomena but did not understand it ca. 350 BCE.
"Why is it that an eclipse of the sun, if one looks at it...through leaves, such as a plane-tree or other broadleaved tree, or if one joins the fingers of one hand over the fingers of the other, the rays are crescent-shaped where they reach the earth?" (Aristotle's work Problems – Book XV)

What Aristotle did not understand was that the rays were crescent-shaped because the hole through the leaves was projecting the crescent shape, the moon partially covering the sun during an eclipse, onto a surface.

It was about 1000 years later that the brilliant Arab scientist Alhazen (the western spelling) showed that when light enters a tiny constricted opening it projects the image outside the opening onto the surface behind the hole, upside down.


While these two instances mentioned above occurred thousands of years after Newgrange, they show that this phenomenon was known to the ancients and also that it occurred naturally. So observant Neolithic people could have noticed this in their own environment when light came through tree leaves, for example.

Around 1500 the first published picture of a construction that utilized this phenomenon was printed. Called a camera obscura, it was a closed darkened room that was often used to observe eclipses since looking directly at the sun was damaging to the eyes.

LEFT: The solar eclipse of January 24, 1544 viewed in a camera obscura building.
"First published picture of camera obscura in Gemma Frisius' 1545 book De Radio Astronomica et Geometrica."
RIGHT: A modern camera obscura at the University of North Carolina - Chapel Hill, my alma mater.

The name 'camera obscura' comes from Latin and means a dark chamber. And the first camera obscuras were actually buildings so making a building was not unusual. The modern word camera comes from this Latin term.

A CAMERA OBSCURA AT NEWGRANGE?

This is a quote from my earlier article about Newgrange:
As a photographer it struck me that the setup at Newgrange is very much like a camera: there is an opening with a lens or aperture, there is a dark chamber, there is an exposure (a period of time that light is allowed into the camera and then shut off), i.e., the 17 minutes that the light shines down the passageway. (Doble, Computing the Winter Solstice at Newgrange)

A camera obscura design could magnify the sun's position. If the back wall is far from the opening that lets in the light, (e.g., the pinhole in a pinhole camera), the object being looked at and its position (in this case the sun) would be greatly magnified. In a sense, it is as though a Neolithic astronomer was looking at the light via a telephoto lens. The image of the sun would be dimmer, but in a totally darkened chamber (when eyes had adjusted) it would be clear. [See 'Summary Of Numbers' below for references.]

A pinhole aperture is only one option. An enclosed darkened chamber could use a roof-box type of design to try out different configurations.

Please note, I am *not* saying that the Neolithic people at Newgrange made something similar to a camera obscura, but only that it was possible in the Neolithic era along with variations on a Newgrange type roof-box with a slit that was able to concentrate the beam of light at the time of the solstice.

However, I believe it must have taken a very long time, thousands of years, to observe the heavens, realize that the years were cyclical based on the sun's precise repetitive movement, and then realize that the lowest point of the sun was the beginning of the next year after which the sun began to move back from its lowest point -- along with probable religious ideas of rebirth and renewal. (I'll go into why in a future blog-article.)

The origins of Newgrange remain somewhat mysterious. Across Ireland, over two hundred similar passage tombs are found, some of which are considerably older than Newgrange... A progression in the scale and sophistication of construction of these passage tombs...may be observed, which taken together indicate a lengthy process of development. [Its origins are] an island-wide story of incremental changes over hundreds of years...
(Hensey, First Light: The Origins of Newgrange)

Yet when Newgrange was finally built, its designers and engineers were very sure of themselves. NASA estimated that it took a workforce of 300 laborers at least 20 years to build. They would not have started on such a grand scale if they were not certain that it would work.
(NASA, Designing Your Own Newgrange Tomb!)


MORE ABOUT NEOLITHIC OPTICS

It is my opinion that the roof-box and slit arrangement were quite sophisticated 'focusing', magnifying, and enhancing devices that are still not entirely understood today. 

In the case of the Newgrange roof-box and slit design, the beam of light was greatly magnified to its maximum length and width around 8 1/2 minutes after it entered the 'roof-box' at Newgrange on the day of the solstice.

"O'Kelly also stated that in 17 minutes the 'first pencil' of direct sunlight widened to a 17cm band and then narrowed before disappearing entirely." (O'Kelly et al. Newgrange: Archaeology, Art and Legend.)

The length of the passageway is 19m (62ft) and in 17 minutes the beam of light reached the furthest end of the passageway before it receded the full distance. So in 8 1/2 minutes (510 seconds) the light went 19m. Doing a basic calculation, this means that the beam of light moved up the passageway at about 3.7cm (about 1.4 inches) per second (1900cm/510sec).

The above shows the dramatic enhancement and magnification that these Neolithic scientists were able to achieve with their roof-box and slit design. I believe this enhancement was accurate enough that it could show the distinction between each day before the solstice, the day of the solstice, and each day after the solstice.



HERE ARE BASIC NUMBERS AND CONCEPTS 
FOR A CAMERA OBSCURA TYPE ARRANGEMENT
IN THE NEOLITHIC TIME PERIOD

THE CAMERA (CHAMBER)
-- An enclosed totally dark chamber which could be a tent, a hut, a small stone building, etc. It would have to be big enough for a person to be inside. I describe how to make an inexpensive portable totally dark A-frame tent (ridge tent) below.
-- The chamber must have a way to make a very small hole at the front that allows light to enter and project onto a back wall. Or a way to position a roof-box type device at the front that is light-tight except for a slit in the box. So the box must be sealed around the edges.

THE EXPOSURE
There are four variables needed to compute a correct exposure. In photography, the term 'exposure' is the total of the variables. Together these are needed to determine how to get a workable image.

-- The brightness of the light source, in this case, the sun (measured in foot-candles).
-- The sensitivity of the light-sensitive material such as film or digital light sensors, but in this case the sensitivity of the human eye in total darkness (ISO)
-- The amount of time it would take to make an exposure (the shutter speed) but in this case, the shutter speed indicates how bright the image will be. A quick shutter speed (approx 1/2 - 2 seconds or less) indicates that a bright workable image could be rendered on a back wall.
-- The f/number that is determined by the size (usually the diameter) of the hole, i.e., the aperture, that lets in the light. This is calculated in combination with the focal length.
----------
The f/number calculation is simple: the distance of the hole from the back wall divided by the diameter of the hole. "For example, the formula for a pinhole camera with a focal length of 100 mm and a pinhole 0.4 mm in diameter is: 100/0.4 = 250, hence the f-number is 250 expressed as f/250."
Determining Exposure Times For Pinhole Cameras
NOTE: While pinhole imaging uses the same formulas as photography, the numbers are often much larger. 

ABOUT THE SENSITIVITY OF THE HUMAN EYE IN TOTAL DARKNESS (ISO)
The human eye is quite remarkable. It can change its sensitivity to light depending on the brightness or darkness of the situation.

When I researched human eye sensitivity in darkness on the Internet, I came up with two figures:
-- ISO 800 for the human eye in low-light conditions
B&H Photo Video Digital
BUT
-- ISO 15,000 when the human eye has been in total darkness for about half an hour.
"If the lowest ISO of our eyes is 25, and our eyes are 600 times more sensitive in the dark, that means that the maximum ISO of the human eye would land somewhere around ISO 15,000 or so."
The Photo Teacher

ABOUT MAGNIFICATION 
The photographer must determine the amount of magnification needed and also the degree of sharpness needed. These are determined as follows:
-- The focal length of the camera determines the magnification. The focal length is the length, normally in mm, from the pinhole to the back wall that the image is projected onto.
-- The f/number is the distance of the pinhole from the back wall divided by the diameter of the hole. The f/number is needed to determine an exposure.
-- A rough rule of thumb is that the focal length in millimeters divided by 40mm will be the magnification. So if the back wall is 2000mm (2 meters)  from the pinhole the magnification will be 2000/40 = 50X.
[See 'Summary Of Numbers' below for reference.]

VARIABLES
-- The larger the hole, the brighter the image but it will be less sharp; the smaller the hole the sharper the image but it will be dimmer (indicated by a longer shutter speed when calculated).

A STANDARD REFERENCE EXPOSURE
-- Photographers will need to make initial calculations based on a known correct exposure which is then recalculated for the tiny pinhole aperture and the extreme brightness of direct sunlight. These numbers are then plugged into the online calculator I have listed at the end of this section.
-- I recommend you work from what is known in photography as a 'Bright Sunny Day' or BSD, i.e., a normal exposure on a sunny day. The formula is that at f/16 the shutter speed will be the inverse of the ISO. So for a camera that has an ISO setting of 400, the exposure would be f/16 at 1/400.
-- B&H Camera wrote that the ISO of the human eye is 800 in darkened conditions. So using the formula above the exposure would be f/16 at 1/800.
-- However, in this case, the ISO is the sensitivity of the human eye after half an hour in total darkness which is perhaps 10,000. 
[See 'Summary Of Numbers' below for reference.]

ABOUT DIRECT SUNLIGHT
Bright direct sunlight is at least 10X brighter than an exposure on the ground (BSD) although the light from a sunrise would not be as bright, perhaps only 5X. This means that an initial working exposure can only be determined by trial and error and direct experience. Yet the numbers listed here give a starting point. [See 'Summary Of Numbers' below for reference.]

While some web pages have listed higher numbers, than these I list next, for the brightness of the sun and the human eye ISO adjusted for total darkness, the numbers I have proposed (10,000 ISO and sunrise = 5X the foot-candles on a BSD) are a middle ground and easy numbers to work with.

So here is an example using all these numbers:
-- aperture diameter = .5 mm for a sharp image (make this larger for a brighter image, smaller for a sharper image)
-- a focal length of 2 meters or 2000mm = 50X magnification (2000/40)
-- the reference exposure (direct sunrise light) is 5x brighter than a BSD so the standard exposure is (10,000 ISO X 5) or 50,000.
-- The above results in a 1.25-second shutter speed meaning that the image should be bright enough to work with. It also yields an aperture of f/4000 (I warned you that the numbers would be large :).


USING THE ONLINE EXPOSURE CALCULATOR

Once a standard exposure is decided, it should be used with the online calculator (next) for all calculations. Change the pinhole size and the focal length to see the magnification and the shutter speed which should be about 1/2 - 2 seconds (but again experiment with this). The online calculator will also suggest an optimal pinhole size. If you use that number you will need to rerun the calculations with that number.

USE THIS EXCELLENT ONLINE CALCULATOR TO WORK WITH THESE VARIABLES

I suggest you plug in f/16 with a shutter speed of 1/50000 and then vary the pinhole size and the focal length to adjust the magnification

Initial Pinhole Calculator. Change the inches to metric top left.
(C) Bob Manekshaw (www.photostuff.co.uk)

Sample starting exposure settings.
(C) Bob Manekshaw (www.photostuff.co.uk)

"Taking photographs with a pinhole camera is always something of an experiment and requires a bit of playing around."


HOW TO MAKE A
PINHOLE/ROOF-BOX
CAMERA OBSCURA

HOW TO BUILD THE ROOM-SIZED CAMERA

A tunnel tent (left) and an A-frame or ridge tent (right).

A large portable light-tight A-frame (ridge) tent can be cheaply and easily made with a wide roll of heavy black plastic, some wooden poles, some rope and twine, a few stakes, and black duct tape (use the Gorilla brand). Make sure that the highest point of the tent allows you to stand up otherwise it can become very uncomfortable after a while. While the middle (the sides) and the floor of the tent can be one continuous piece of black plastic, the black plastic covering for the front and back will need to be sealed with black duct tape. The back could be used as the entrance with a flap that opens under overlapping black plastic and then closes, light-tight, after entry.


A tunnel tent can be made almost as easily with poles that bend and are joined at the top. Then the black plastic is hung on these poles.

No matter what techniques or approach is used, magnification is important, in fact, it is crucial for determining the position of the sun around the time of the solstice. Because it is only with magnification that slight differences can be enlarged and then evaluated. Magnification is possible with both approaches.



Students could make a light-tight A-frame or tunnel tent, for example, and then hang a white foam board or some such thing at different distances from the pinhole to determine the optimal focal length and magnification.


They could do this at any time of the year to try out various designs, settings, and configurations -- it does not have to be on the solstice. Students could pick any five sunrises in sequence to study initially. When perfected, they could then turn the tent toward the solstice. 

Various types/sizes of pinholes or apertures could be tried out such as a horizontal slit. A piece of thin aluminum over a cut-out hole in the front plastic could be made with several different holes, for example. The holes that were not being used could be covered with black duct tape, the tape could then be removed when a particular hole was used.

NOTE: Ventilation. Inexpensive small darkroom vents can be attached to the plastic tent. This is recommended because a light-tight closed-in tent would need some ventilation.

A ROOF-BOX CONFIGURATION

As I said, another approach would be to make a light-capturing device based on the 'roof-box' and slit at Newgrange. It would send a beam of light down the tent. It could be made out of cardboard. The roof-box could be placed in the front supported by a table behind the black plastic. A large rectangular hole would need to be cut in the plastic for the roof-box; its edges would then need to be sealed with black duct tape. In this case, students could observe how the light moves over time, how it spreads, and what differences they could discern from sunrise to sunrise such as the different angles of light.

It should not be hard to make a small cardboard replica of the 'roof-box' and slit and then see how light is directed through this structure, especially when changing the size or shape of the slit. An adjustable set of sliding horizontal tabs could be made that would allow a student to make the slit longer or shorter and another set of vertical tabs could make the slit wider or narrower. These tabs should be painted black. Once the box is made, students could also play with different configurations, such as using tin foil to funnel the light. 


SUMMARY OF THE NUMBERS

Sunny Day Landscape normal exposure (the reference exposure)
The f/16 ISO rule.

Sunny Day Landscape
A normal bright sunny day (BSD) exposure of the landscape in foot-candles.

Direct Sunlight From the Sun
The brightness of direct sunlight in foot-candles:
11, 802 foot-candles (127,000 lumens/10.76 lumens per foot candle) or more than 10X the exposure for a sunny landscape.

A quality pinhole photo showing what is possible with pinhole photography.

Sensitivity Of The Human Eye 
The sensitivity of the human eye in darkness:
In darkened conditions: ISO 800
In total darkness with the eye adjusted to the darkness for half an hour:
ISO 10000 or 15000

Pinhole size:
Optimal for normal pinhole photography is about .3mm. 
But with a long focal length, 1-3 mm may be necessary.
There are two main considerations, sharpness and contrast. 
Making, Measuring and Testing the “Optimal” Pinhole: Pinhole Adventures Part 3 – by Sroyon
---------
This website has detailed information about the needle size and the hole it makes. BUT the information is in inches which, in photography, needs to be in millimeters. So convert the inches to millimeters. When making a pinhole rotate the pin so that you have an evenly round hole.
Pinhole Camera Aperture Chart

'Solargraphs' taken with pinhole cameras. 
LEFT: Pictures of the sun's path at different times of the year. "Solarography Summer solstice, equinox and winter solstice in Skopje."
RIGHT: "1 year exposure taken on the whole year of 2014. The Sun leaves trails in her apparent motion from East to West. From the third elevation on Sashegy, Buda, Budapest, Hungary."

The size of the sun
1800mm
NASA, Space Math

The amount of movement around the days of the solstice is 30 mm.
Scientific Borobudur
Dr. Uday Dokras
2021, Indo Nordic Author's Collective

Focal Length
The focal length is the distance in millimeters between the pinhole and the back wall or the surface that the image is projected onto.

Magnification:
Focal length divided by 40 mm, approx.
Based on the calculations made with the Pinhole Calculator


__________________________
AFTERWORD

MY PINHOLE BACKGROUND

Years ago I worked with pinhole cameras for a while.

LEFT: A pinhole camera made from a Quaker Oats box.
RIGHT: A photograph taken with a pinhole camera similar to the Quaker Pinhole (right).

I designed and taught a pinhole photography workshop with young people at the Durham Museum of Life and Science for a couple of years. We used a Quaker Oats box for the camera. We then cut a small opening in the middle, attached tin foil over the hole, and then made a pinhole in the tin foil. For film, we used regular photographic printing paper which resulted in a negative image when developed. The kids could then make a positive by contact printing. The negative was placed on top of an unexposed piece of print paper and then a light source was turned on above it. When developed the bottom paper was a positive.

How I made a 'zoom' Polaroid pinhole camera. :)
A Zeiss Ikon bellows camera of 1925 (left). A Polaroid Big Swinger (middle); I cut the back off with a hacksaw and then attached it to the back of the Zeiss Ikon camera with epoxy. Polaroid Film pack (right). This film pack went into the Polaroid back now attached to the Zeiss Ikon camera.

I also invented (sort of) a zoom pinhole Polaroid camera. Really! Someone gave me an old Zeiss Ikon bellows camera made around 1925. I took off the front lens and covered the hole where the lens had been with tin foil. Then I made a pinhole in the tin foil. Next, I took off the Zeiss Ikon film back which was designed for 6X9cm sheet film, and attached the back of a plastic Polaroid 'Big Swinger' camera that I had cut in half with a hacksaw. I used epoxy to join the camera to the Swinger film back. The Swinger used the early Polaroid peel-apart film. Because the bellows could compress to just a few mm in front of the film, making it a wide-angle lens, and then rack all the way out to about half a meter from the film, making it a telephoto lens, I had a zoom pinhole camera. 


A real shaft of sunlight in my home.
This moving image is made from real undoctored photographs that I put together in sequence to make an animation. They are about a surprising 'light show' that happened by chance in our home 20 years ago. The animation was made by shooting regular photographs in sequence and then sandwiching them together to make a GIF animation.
About a month after the spring equinox, a beam of light came through our small kitchen window soon after sunrise. The light then continued through a doorway that funneled the light onto an oil lamp sitting on a shelf 20 feet from the kitchen window. I also observed that the light moved very quickly over the lamp during this time, about 3.5 inches a minute. About ten minutes later the light beam was gone and a week later this event stopped entirely. 
This happened 20 years ago but today, after writing about the light in the passageway at Newgrange, it makes more sense. First: It happened by chance, so similar chance happenings in a forest, for example, could have happened in prehistoric times. Secondly: The way the light was funneled and its distance from the window magnified its movement. 
I am also quite sure that living with changing light from dawn to dusk and from season to season was something that the Neolithic people understood much better than we do today since we spend so much time indoors under artificial light. 

________________________
ENDNOTES

Doble, Rick. "Computing the Winter Solstice at Newgrange: Was Neolithic Science Equal To or Better Than Ancient Greek or Roman Science?" Newgrange.com/winter-solstice-newgrange.htm. https://www.newgrange.com/winter-solstice-newgrange.htm

Dokras, Dr. Uday.  Indo Nordic Author's Collective, 2021, p. 27. https://www.academia.edu/45293374/Scientific_Borobudur

Duke, Dennis, PhD. Department of Physics, Florida State University, Lecture 2. https://computingreimagined.com/~dduke/lectures/lecture2.pdf

Hensey, Robert. First Light: The Origins of Newgrange, Oxbow Books, 2015. The review cites information from this book. https://www.newgrange.com/origins-of-newgrange.htm

McClellan, James E. III; Dorn, Harold. Science and Technology in World History: An Introduction, third edition. Johns Hopkins University Press; third edition, 2015, p. 23. 

Murphy, Anthony. "101 facts about Newgrange. " Mythicalireland.com. https://mythicalireland.com/ancient-sites/101-facts-about-newgrange/

NASA. "Designing Your Own Newgrange Tomb!" P8Newgrange.pdf, p.1. http://spacemath.gsfc.nasa.gov/SED11/P8Newgrange.pdf

Newcomb, Tim. "The World’s 20 Most Impressive Ancient Builds." Popular Mechanics, April 8, 2021. https://www.popularmechanics.com/technology/infrastructure/a35867403/ancient-architecture/

O'Brien, Tim. "Reflections on Loughcrew and Newgrange." www.newgrange.com. https://www.newgrange.com/loughcrew-newgrange.htm

O'Kelly, Claire. Illustrated Guide to Newgrange and the Other Boyne Monuments. 1978, p. 112.

O'Kelly, Michael J.; O'Kelly, Claire. Newgrange: Archaeology, Art and Legend. Thames & Hudson, 1982.

Pearse, Roger. "Christmas Day On The Winter Solstice." Roger-pearse.com/weblog. https://www.roger-pearse.com/weblog/2009/12/26/christmas-day-on-the-winter-solstice/

What is Newgrange? Whatisarchaeo.wixsite.com/whatisarchaeology/newgrange. https://whatisarchaeo.wixsite.com/whatisarchaeology/newgrange

Williams, Ken. "Re-discovering the ‘lost’ records of the Newgrange roof-box." Shadowsandstone.com/newgrange-roofbox https://www.shadowsandstone.com/newgrange-roofbox