History Online - Time
Learn how and why Ancient Rome, Greece and Egypt were crafted during Renaissance. What if the Old Testament was a rendition of events of Middle Ages written after the New Testament? Did the crusaders really wait for 1000 years to punish the tormentors of the Messiah? What if Jesus Christ was born in 1053 and crucified in 1086 AD?
This book crowns over 30 of meticulous and extensive research.
Chapter 1 The problems of historical chronology
Celestial bodies, the sun, moon, planets, and stars have provided us a reference for measuring the passage of time throughout our existence. Ancient civilizations relied upon the apparent motion of these bodies through the sky to determine seasons, months, and years.
After the Sumerian culture was lost without passing on its knowledge, the Egyptians were the next to formally divide their day into parts something like our hours. Obelisks (slender, tapering, four-sided monuments) were built as early as 3500 B.C. Their moving shadows formed a kind of sundial, enabling citizens to partition the day into two parts by indicating noon. They also showed the year's longest and shortest days when the shadow at noon was the shortest or longest of the year. Later, markers added around the base of the monument would indicate further time subdivisions.
Having described a variety of ways devised over the past few millennia to mark the passage of time, it is instructive to define in broad terms what constitutes a clock. All clocks must have two basic components:
In 1656, Christiaan Huygens, a Dutch scientist, made the first pendulum clock, regulated by a mechanism with a "natural" period of oscillation. Although Galileo Galilei, sometimes credited with inventing the pendulum, studied its motion as early as 1582, Galileo's design for a clock was not built before his death. Huygens' pendulum clock had an error of less than 1 minute a day, the first time such accuracy had been achieved. His later refinements reduced his clock's errors to less than 10 seconds a day.
The Shortt clock was replaced as the standard by quartz crystal clocks in the 1930s and 1940s, improving timekeeping performance far beyond that of pendulum and balance-wheel escapements.
Quartz clock operation is based on the piezoelectric property of quartz crystals. If you apply an electric field to the crystal, it changes its shape, and if you squeeze it or bend it, it generates an electric field. When put in a suitable electronic circuit, this interaction between mechanical stress and electric field causes the crystal to vibrate and generate a constant frequency electric signal that can be used to operate an electronic clock display.
Sounds unbelievable? Not after you've read "History: Fiction or Science?" by Anatoly Fomenko, leading mathematician of our time. He follows in steps of Sir Isaac Newton and finds clear evidence of falsification of History. Armed with logic, astronomy and computers he proves the history of humankind to be both dramatically different and drastically shorter than generally presumed.
Archaeological, dendrochronological, paleographical and carbon methods of dating of ancient sources and artifacts are both non-exact and contradictory, therefore there is not a single piece of firm written evidence or artifact that could be reliably and independently dated earlier than the XI century.
The consensual chronology we live with was essentially crafted in the XVI century from the contradictory mix of innumerable copies of ancient Latin and Greek manuscripts (all originals have mysteriously disappeared) and the "proofs" delivered by the late mediaeval astronomers, cemented by the authority of writings of the Church Fathers.
In fact, for the last 300 years, the whole class of historians created, researched, perfected and polished a world of phantom universal history and classical civilization artfully constructed by their predecessors in the course of XVI-XVIII centuries at the command of powers of that time. They have polished the real world history into oblivion!
"History: Fiction or Science?", leads You step by step to the inevitable conclusion that the classical chronology is false and therefore, that the history of ancient and medieval world, is also FALSE. After reading this book you will certainly have a fresh and very suspicious outlook on "ancient" and "enigmatic" Roman, Greek and Egyptian, mediaeval as well as all other "lost and found" civilizations.
Henry Ford once said: "History is more or less bunk!"
Prominent mathematician Anatoly Fomenko proves it.
Contents
1. Roman chronology as the foundation of European chronology
2. Scaliger, Petavius, and other clerical chronologers.
The creation of contemporary chronology of the ancient times in the XVI-XVII century a.d.
3. The veracity of the Scaliger-Petavius chronology was questioned as early as the XVI century
3.1. Who criticized Scaliger's chronology and where.
3.1.1. De Arcilla, Robert Baldauf, Jean Hardouin, Edwin Johnson, Wilhelm Kammeyer
3.1.2. Sir Isaac Newton
3.1.3. Nikolai Alexandrovich Morozov
3.1.4. Recent publications of German scientists containing criticisms of Scaliger's chronologY.
3.2. The questionnable veracity of the Roman chronology and history.
The hypercritical school of the XIX century
4. The problems in establishing a correct chronology of "ancient" Egypt
5. The problem in dating the "ancient" sources.Tacitus and Poggio
Cicero and Barzizza. Vitruvius and Alberti
6. Timekeeping in the Middle Ages. Historians discuss the "chaos reigning
in the mediaeval datings."
Peculiar mediaeval anachronisms
7. The chronology and the dating of Biblical texts
8. Difficulties and contradictions arising from the reading of old texts
8.1. How does one read a text written in consonants exclusively? The vocalization problem
9. Problems in the Scaligerian geography of Biblical events
9.1. Archaeology and the Old Testament
9.2. Archaeology and the New Testament
10. Ancient historical events: geographic localization issues
10.1. The locations of Troy and Babylon.
13.3. The alleged acceleration of the destruction of the "ancient" monuments
10.2. The geography of Herodotus is at odds with the Scaligerian version
10.3. The inverted maps of the Middle Ages
11. A modern analysis of Biblical geography
12. The mysterious Renaissance epoch as a product of the Scaligerian chronology
13. The foundations of archaeological methods have been based
on the Scaligerian
chronology from the very beginning
13.4. When did the construction of the Cologne Cathedral really begin?
13.5. Archaeological methods are most often based on Scaliger's datings
13.6. One of the numerous problems of the Scaligerian history
the problem
of bronze manufacture before the discovery of tin.
14. The problems and deficiencies of dendrochronology and several other dating methods
14.1. The consequent scale of dendrochronological datings does not extend
further back in time than the X century a.d.
14.2. Sedimentary layer datings. The methods of radium-uranium and radium-actinium analysis
15. Are radiocarbon datings to be trusted?
15.1. The radiocarbon datings of ancient, mediaeval, and modern specimens are scattered chaotically
15.1.1. Libby's initial idea. The first failures
15.1.2. A criticism of the application of the radiocarbon method to historical specimens
15.2. The dating of the Shroud of Turin
15.3 Modern radiocarbon analysis of Egyptian artefacts demonstrates serious contradictions
16. Critical analysis of the hypotheses on which the radiocarbon method is based. By A. S. Mishchenko
16.1. W. F. Libby's initial idea
16.2. Physical basics of the radiocarbon method
16.3. The hypotheses that the radiocarbon method is based upon
16.4. The moment of the object's departure from the exchange reservoir
16.5. Radiocarbon content variations in the exchange reservoir
16.6. Variations in radiocarbon content of living bodies
18. Numismatic datings
Chapter 2 Astronomical datings
1. The strange leap of parameter D" in the Theory of Lunar Motion
2. Are the "ancient" and mediaeval eclipses dated correctly?
2.1. Some astronomical data
2.2. The discovery of an interesting effect: an unprejudiced astronomical dating
shifts the dates of the "ancient" eclipses to the Middle Ages
2.3. Three eclipses described by the "ancient" Thucydides
2.4. The eclipses described by the "ancient" Titus Livy
3. Transferring the dates of the "ancient" eclipses forward in time into
the Middle Ages
eliminates the enigmatic behaviour of the parameter D".
4. Astronomy moves the "ancient" horoscopes into the Middle Ages
4.1. The mediaeval astronomy
4.2. The method of unprejudiced astronomical dating
4.3. Many "ancient astronomical observations" may have been theoretically
calculated
by late mediaeval astronomers and then included into the "ancient"
chronicles as "real observations"
4.4. Which astronomical "observations of the ancients" could have been
a result
of late mediaeval theoretic calculations?
5. A brief account of several examples of Egyptian Zodiacs
5.1. Some general observations
5.2. The Dendera Zodiacs
5.3. The horoscopes of Brugsch and Flinders Petrie
5.4. Finite datings of the Egyptian Zodiacs based on their complete deciphering,
as obtained by A. T. Fomenko and G. V. Nosovskiy in 2001
5.5. On the errors of E. S. Goloubtsova and Y. A. Zavenyagin 6. Astronomy in the New Testament
Chapter 3 The new dating of the astronomical horoscope as described in the Apocalypse
By A. T. Fomenko and G. V. Nosovskiy
1. The proposed research method
2. General information about the Apocalypse and the time of its creation
3. Ursa Major and the throne
4. The events took place on the Isle of Patmos
5. The constellations of Cassiopeia and the throne were drawn as Christ
sitting on his throne in the Middle Ages
6. The Milky Way
7. Twenty-four sidereal hours and the constellation of the Northern Crown
8. Leo, Taurus, Sagittarius, Pegasus
9. The daily rotation of the Northern Crown
10. Equine planetary images in mediaeval astronomy
11. Jupiter is in Sagittarius
12. Mars is beneath Perseus in either Gemini or Taurus
13. Mercury is in Libra
14. Saturn is in Scorpio
15. The Sun is in Virgo with the Moon underneath the feet of the latter
16. Venus is in Leo
17. The astronomical dating of the Apocalypse by the horoscope it contains
18. Our reconstruction of the initial content of the Apocalypse
Chapter 4 Astronomy in the Old Testament
1. Mediaeval astronomy in the Old Testament Book of Ezekiel
1.1. The title of the book
1.2. The description of the Milky Way and the Ophiuchus constellation
1.3. The Biblical description of the astronomical sectors, or "wings," on the celestial sphere
1.4. The constellations of Leo, Taurus and Aquila
1.5. The Biblical description of the mediaeval "wheels," or planetary orbits
1.6. Parallels with the astronomical symbolism of the Apocalypse
1.7. Biblical cherubim, chariots, and mediaeval planetary orbital wheels
1.8. The Biblical description of mediaeval cosmology as a celestial temple
2. The Biblical prophecy of Zechariah and the date of its creation
3. The Biblical prophecy of Jeremiah and the date of its creation
4. The Biblical prophecy of Isaiah and the date of its creation
5. The Biblical prophecy of Daniel and the date of its creation
Chapter 5 The methods of dating the ancient events offered by mathematical statistics
1. The local maxima method
1.1. The historical text volume function
1.2. The maxima correlation principle
1.3. Statistical model
1.4. Experimental test of the maxima correlation principle.
Examples of dependent and independent historical texts
1.5. Method of dating the historical events
2. Volume functions of historical texts and the amplitude correlation principle.
By A. T. Fomenko and S. T. Rachev
2.1. Dependent and independent chronicles. Volume function maxima correlletions
2.2. Rich and poor chronicles and chronicle zones
2.3. Significant and insignificant zeroes of volume functions
2.4. The information respect principles
2.5. The amplitude correlation principle of volume graphs in the poor zones of chronicles
2.6. Description of statistical model and formalization
2.7. The hypothesis about the increase of the "form" parameter of a chronicle in the course of times
2.8. The list and characteristics of the Russian chronicles we investigated
2.9. The final table of the numeric experiment
2.10. Interesting consequences of the numeric experiment.
The confirmation of the statistical model
2.11. Comparison of a priori dependent Russian chronicles
2.12. Comparison of a priori independent Russian chronicles
2.13. Growth of form parameter in the course of time
for the Russian chronicles after the XIII century
2.14. Growth of the average form parameter over the course of time
for groups
of Russian chronicles of the XIII-XVI century
2.15. Growth of the average parameter of form over the course of time
for the groups
of Russian chronicles of the alleged IX-XIII century
2.16. Chronological shift by 300 or 400 years in Russian history
2.17. Conclusions
3. The maxima correlation principle on the material of the sources pertinent
to
the epoch of Strife in the History of Russia (1584-1619)
By A. T. Fomenko, N. S. Kellin and L. E. Morozova
4. The method for the recognition and dating of the dynasties of rulers.
The small dynastic distortions principle
4.1. The formulation of the small dynastic distortions principle
4.2. The statistical model
4.3. Refinement of the model and the computation experimens
4.4. Result of the experiment: coefficient c(a, b) positively distinguishes
between the dependent and independent dynasties of kings
4.5. The method of dating the royal dynasties and the method
detecting the phantom dynastic duplicates
5. The frequency damping principle.The method of ordering of historical texts in time
6. Application of the method to some concrete historical texts
7. Method of dating of the events
8. The frequencies duplication principle. The duplicate detection method
9. Statistical analysis of the Bible
9.1. Partition of the Bible into 218 "generation chapters"
9.2. Detection of the previously known duplicates in the Bible
with the aid of the frequency dumping principle
9.3. New, previously unknown duplicates we discovered in the Bible.
General scheme of their distribution within the Bible
9.4. A representative example: the new statistical dating of the Apocalypse,
which moves from the New Testament into the Old Testament
10. The method of form-codes. The comparison of two long currents of regal biographies
11. Correct chronological ordering method and dating of ancient geographical maps
Chapter 6 The construction of a global chronological map and the results of applying
mathematical procedures of dating to the Scaligerian version of the ancient history
1. Textbook of ancient and mediaeval history in the consensual Scaliger-Petavius datings
2. Mysterious duplicate chronicles inside the "Scaliger-Petavius textbook"
3. Mysterious duplicate regal dynasties inside the "textbook by Scaliger-Petavius"
4. Brief tables of some astonishing dynastic parallelisms
5. Conformity of results obtained by different methods
5.1. General assertion
5.2. The agreement of the different methods on the example of the identification
of the Biblical Judaic reign with the Holy Roman Empire of allegedly X-XIII century a.d.
6. The general layout of duplicates in "the textbook by Scaliger-Petavius".
The discovery of the three basic chronological shifts
7. The Scaligerian textbook of the ancient history glued together
four duplicates of the short original chronicle
8. The list of phantom "ancient" events which are phantom duplicates,
or reflections of the mediaeval originals
9. Identification of the "ancient" Biblical history with the mediaeval European history
10. Our hypothesis: history as described in surviving chronicles only begins in ca. the X century a.d.
We know nothing of the events that took place before the X century a.d.
11. Authentic history only begins in XVII century a.d.
The history of the XI-XVI century is largely distorted.
Many dates of the XI-XVI century require correction
12. The radical distinction of our chronological concept from the version of N. A. Morozov
13. The hypothesis about the cause of the fallacious chronological
shifts
in the creation of the history of antiquity
13.1. Chronological shift of a thousand years as the consequence of the fallacious dating of Jesus Christ's life
13.2. The letter "X" formerly denoted the name of Christ,
but was later proclaimed to stand for the figure of ten.
The letter "I" formerly denoted the name of Jesus, but
was later proclaimed to be the indication of one thousand
13.3. Until the XVIII century, the Latin letters "I" or "J" - i.e. the
first letters of the name of Jesus -
were still used in several
European regions to denote "one" in recording of dates
13.4. How the chronological shift by 330 or 360 years could have occured
13.5. What latin letters "M", "D", "C" in Roman dates meant originally, in the Middle Ages
13.5.1. General idea
13.5.2. Example: the date on the tomb of Empress Gisela
13.5.3. Another example: the date on the headstone of Emperor Rudolf Habsburg
13.5.4. Recording of mediaeval dates was not unified everywhere even in the XVIII century
13.5.5. Some datings of printed books and manuscripts dating
from the XV-XVII century
will apparently have to be moved
forwards in time by at least fifty more years
13.6. The foundation date of Rome of Italy
13.7. A later confusion of foundation dates of the two Romes,
on the Bosporus and in Italy.
13.8. Scaliger and the Council of Trent. Creation of the Scaligerian
chronology
of antiquity in the XVI-XVII century
13.9. Two phantom "ancient" reflections of Dionysius Petavius,
a mediaeval chronologist of the XVII century
14. A stratified structure of the Scaligerian textbook of ancient history
15. The coordination of a new astronomical dating with a dynastic parallel
16. A strange lapse in the Scaligerian chronology near "the beginning of the new era"
Chapter 7 "Dark Ages" in mediaeval history
1. The mysterious Renaissance of the "Classical Age" in mediaeval Rome
1.1. The lugubrious "Dark Ages" in Europe that presumably succeeded
the beauteous "Classical Age"
1.2. Parallels between "antiquity" and the Middle Ages that are known
to historians, but misinterpreted by them
1.3. Mediaeval Roman legislators convene in the presumably destroyed "ancient" Capitol
1.4. The real date when the famous "ancient" statue of Marcus Aurelius
was manufactured
1.5. Could the "ancient" Emperor Vitellius have posed for the mediaeval
artist Tintoretto?
1.6. The amount of time required for the manufacture of one sheet of parchment
1.7. The "ancient" Roman Emperor Augustus had been Christian, since
he wore a mediaeval crown with a Christian cross
2. The "ancient" historian Tacitus and the well-known Renaissance writer Poggio Bracciolini
3. The mediaeval Western European Christian cult and the "ancient" pagan
Bacchic celebrations
4. Petrarch (= Plutarch?) and the "Renaissance of antiquity"
4.1. How Petrarch created the legend of the glory of Italian Rome out of nothing
4.2. Petrarch's private correspondence with people considered
"ancient characters" nowadays
5. "Ancient" Greece and mediaeval Greece of the XIII-XVI century
5.1. The history of the mediaeval Athens is supposed to be obscured by darkness
up until the XVI century
5.2. Greece and the Crusades
5.3. The history of Greek and Athenian archaeology is relatively short
5.4. The tendentious distortion of the image of mediaeval Athens in
the "restoration works"
of the XIX-XX century
6. Strange parallels in the Scaligerian history of religions
6.1. Mediaeval Christianity and its reflection in the Scaligerian "pagan antiquity"
6.2. Mediaeval Christianity and "ancient" Mithraism
6.3. References to Jesus Christ contained in "ancient" Egyptian artefacts
6.4. Researchers of the ancient religions commenting on the strange similarities
between the cults of "antiquity" and those of the Middle Ages
6.5. Moses, Aaron and their sister Virgin Mary on the pages of the Koran
6.6. The XI century as the apparent epoch of St. Mark's lifetime.
The history of St. Mark's Cathedral in Venice
7. The "ancient" Egypt and the Middle Ages
7.1. The odd graph of demotic text datings
7.2. The enigmatic "revival periods" in the history of "ancient" Egypt
7.3. The ancient Hittites and the mediaeval Goths
8. Problems inherent in the Scaligerian chronology of India
9. Was the artificial elongation of ancient history deliberate?
Annexes
2.1. (to chapter 2) Grammatical analysis of an eclipse description
in History by Thucydides. By Y. V. 471
5.1. (to chapter 5) Per annum volume distribution in some Russian chronicles
5.2. (to chapter 5) Frequency matrix of names and parallels in the Bible
By V. P. Fomenko and T. G. Fomenko
6.1. (to chapter 6) Per annum volume distribution in The History of the City
of Rome
in the Middle Ages by F. Gregorovius
6.2. (to chapter 6) Per annum volume distribution in The Roman History
from
the Foundation of the City by Titus Livy
6.3. (to chapter 6) Per annum volume distribution in the book by Baronius
describing mediaeval Rome
6.4. (to chapter 6) The "double entry" of the Biblical royal reigns of Israel and Judah
6.5. (to chapter 6) Armenian history. Emperors of the Holy Roman Empire
of the alleged X-XIII century a.d., a.k.a. the Kings of Judah, a.k.a. the
mediaeval Armenian Catholicoses
1. Three phantom reflections of the same mediaeval dynasty
2. The parallelism between the mediaeval Armenian history
and the phantom Roman Empire according to Scaliges
6.6. (to chapter 6) The identification of the "ancient" Kingdom of Judah
with the Holy Roman Empire of the alleged X-XIII century a.d.
The correlation between reign durations and biographical volumes
Time measurement
A brief history of the clock
Little is known about the details of timekeeping in prehistoric eras, however, records and artifacts that are discovered, show that in every culture, people were preoccupied with measuring and recording the passage of time. Ice-age hunters in Europe over 20,000 years ago scratched lines and gouged holes in sticks and bones, possibly counting the days between phases of the moon. Five thousand years ago, Sumerians in the Tigris-Euphrates valley in today's Iraq had a calendar that divided the year into 30-day months, divided the day into 12 periods (each corresponding to 2 of our hours), and divided these periods into 30 parts (each like 4 of our minutes). There are no written records of the creating of Stonehenge, built over 4000 years ago in England, but its alignments show its purposes apparently included the determination of seasonal or celestial events, such as lunar eclipses, solstices and so on.
The earliest Egyptian calendar was based on the moon's cycles, but later the Egyptians realized that the "Dog Star" in Canis Major, which is now called Sirius, rose next to the sun every 365 days, about when the annual inundation of the Nile began. Based on this knowledge, they devised a 365-day calendar that seems to have begun in 4236 B.C., the earliest recorded year in history.
In Babylonia, again in Iraq, a year of 12 alternating 29-day and 30-day lunar months was observed before 2000 B.C., giving a 354-day year. In contrast, the Mayans of Central America relied on not only the sun and moon, but also the planet Venus, to establish 260-day and 365-day calendars. This culture flourished from around 2000 B.C. until about 1500 A.D. They left celestial-cycle records indicating their belief that the creation of the world occurred in 3113 B.C. Their calendars later became portions of the great Aztec calendar stones. Other civilizations, including the modern West, have adopted a 365-day solar calendar with a leap year occurring every fourth year.
Not until somewhat recently (that is, in terms of human history) did people find a need for knowing the time of day. As best we know, 5000 to 6000 years ago great civilizations in the Middle East and North Africa initiated clock making as opposed to calendar making. With their attendant bureaucracies and formal religions, these cultures found a need to organize their time more efficiently.
Sun Clocks
Another Egyptian shadow clock or sundial, possibly the first portable timepiece, came into use around 1500 B.C. to measure the passage of "hours." This device divided a sunlit day into 10 parts plus two "twilight hours" in the morning and evening. When the long stem with 5 variably spaced marks was oriented east and west in the morning, an elevated crossbar on the east end cast a moving shadow over the marks. At noon, the device was turned in the opposite direction to measure the afternoon "hours."
The merkhet, the oldest known astronomical tool, was an Egyptian development of around 600 B.C. Two merkhets were used to establish a north-south line by lining them up with the Pole Star. They could then be used to mark off nighttime hours by determining when certain other stars crossed the meridian.
In the quest for more year-round accuracy, sundials evolved from flat horizontal or vertical plates to forms that were more elaborate. One version was the hemispherical dial, a bowl-shaped depression cut into a block of stone, carrying a central vertical gnomon (pointer) and scribed with sets of hour lines for different seasons. The hemicycle, said to have been invented about 300 B.C., removed the useless half of the hemisphere to give an appearance of a half-bowl cut into the edge of a squared block. By 30 B.C., Vitruvius could describe 13 different sundial styles in use in Greece, Asia Minor, and Italy.
Elements of a Clock
- A regular, constant or repetitive process or action to mark off equal increments of time. Early examples of such processes included movement of the sun across the sky, candles marked in increments, oil lamps with marked reservoirs, sand glasses ("hourglasses"), and in the Orient, small stone or metal mazes filled with incense that would burn at a certain pace.
- A means of keeping track of the increments of time and displaying the result. Our means of keeping track of time passage include the position of clock hands and a digital time display.
The history of timekeeping is the story of the search for ever more consistent actions or processes to regulate the rate of a clock.
Water Clocks
Water clocks were among the earliest timekeepers that did not depend on the observation of celestial bodies. One of the oldest was found in the tomb of Amenhotep I, buried around 1500 B.C. Later named clepsydras ("water thief") by the Greeks, who began using them about 325 B.C., these were stone vessels with sloping sides that allowed water to drip at a nearly constant rate from a small hole near the bottom. Other clepsydras were cylindrical or bowl-shaped containers designed to slowly fill with water coming in at a constant rate. Markings on the inside surfaces measured the passage of "hours" as the water level reached them. These clocks were used to determine hours at night, but may have been used in daylight as well. Another version consisted of a metal bowl with a hole in the bottom; when placed in a container of water the bowl would fill and sink in a certain time. These were still in use in North Africa this century.
More elaborate and impressive mechanized water clocks were developed between 100 B.C. and 500 A.D. by Greek and Roman horologists and astronomers. The added complexity was aimed at making the flow more constant by regulating the pressure, and at providing fancier displays of the passage of time. Some water clocks rang bells and gongs; others opened doors and windows to show little figures of people, or moved pointers, dials, and astrological models of the universe.
A Greek astronomer, Andronikos, supervised the construction of the Tower of the Winds in Athens in the 1st century B.C. This octagonal structure showed scholars and marketplace shoppers both sundials and mechanical hour indicators. It featured a 24-hour mechanized clepsydra and indicators for the eight winds from which the tower got its name, and it displayed the seasons of the year and astrological dates and periods. The Romans also developed mechanized clepsydras, though their complexity accomplished little improvement over simpler methods for determining the passage of time.
In the Far East, mechanized astronomical/astrological clock making developed from 200 to 1300 A.D. Third-century Chinese clepsydras drove various mechanisms that illustrated astronomical phenomena. One of the most elaborate clock towers was built by Su Sung and his associates in 1088 A.D. Su Sung's mechanism incorporated a water-driven escapement invented about 725 A.D. The Su Sung clock tower, over 30 feet tall, possessed a bronze power-driven armillary sphere for observations, an automatically rotating celestial globe, and five front panels with doors that permitted the viewing of changing manikins which rang bells or gongs, and held tablets indicating the hour or other special times of the day.
Since the rate of flow of water is very difficult to control accurately, a clock based on that flow could never achieve excellent accuracy. People were naturally led to other approaches.
In Europe during most of the Middle Ages (roughly 500 to 1500 A.D.), technological advancement was at a virtual standstill. Sundial styles evolved, but didn't move far from ancient Egyptian principles.
During these times, simple sundials placed above doorways were used to identify midday and four "tides" of the sunlit day. By the 10th Century, several types of pocket sundials were used. One English model identified tides and even compensated for seasonal changes of the sun's altitude.
Then, in the early-to-mid-14th century, large mechanical clocks began to appear in the towers of several large Italian cities. There is no evidence or record of the working models preceding these public clocks that were weight-driven and regulated by a verge-and-foliot escapement.
Verge-and-foliot mechanisms reigned for more than 300 years with variations in the shape of the foliot. All had the same basic problem: the period of oscillation of this escapement depended heavily on the amount of driving force and the amount of friction in the drive. Like water flow, the rate was difficult to regulate.
Another advance was the invention of spring-powered clocks between 1500 and 1510 by Peter Henlein, a German locksmith from Nuremberg. Replacing the heavy drive weights permitted smaller (and portable) clocks and watches. Henlein nicknamed his clocks "Nuremberg Eggs". Although they slowed down as the mainspring unwound, they were popular among wealthy individuals due to their size and the fact that they could be put on a shelf or table instead of hanging from the wall. They were the first portable timepieces. However, they only had an hour hand, minute hands did not appear until 1670, and there was no glass protection. Glass over the face of the watch did not come about until the 17th century. Still, Henlein's advances in design were precursors to truly accurate timekeeping.
Accurate Mechanical Clocks
Around 1675, Huygens developed the balance wheel and spring assembly, still found in some of today's wrist watches. This improvement allowed 17th century watches to keep time to 10 minutes a day. And in London in 1671 William Clement began building clocks with the new "anchor" or "recoil" escapement, a substantial improvement over the verge because it interferes less with the motion of the pendulum.
In 1721, George Graham improved the pendulum clock's accuracy to 1 second a day by compensating for changes in the pendulum's length due to temperature variations. John Harrison, a carpenter and self-taught clock-maker, refined Graham's temperature compensation techniques and added new methods of reducing friction. By 1761, he had built a marine chronometer with a spring and balance wheel escapement that won the British government's 1714 prize (of over $2,000,000 in today's currency) offered for a means of determining longitude to within one-half degree after a voyage to the West Indies. It kept time on board a rolling ship to about one-fifth of a second a day, nearly as well as a pendulum clock could do on land, and 10 times better than required.
Over the next century refinements led in 1889 to Siegmund Riefler's clock with a nearly free pendulum, which attained an accuracy of a hundredth of a second a day and became the standard in many astronomical observatories. A true free-pendulum principle was introduced by R. J. Rudd about 1898, stimulating development of several free-pendulum clocks. One of the most famous, the W. H. Shortt clock, was demonstrated in 1921. The Shortt clock almost immediately replaced Riefler's clock as a supreme timekeeper in many observatories. This clock consists of two pendulums, one a slave and the other a master. The slave pendulum gives the master pendulum the gentle pushes needed to maintain its motion, and also drives the clock's hands. This allows the master pendulum to remain free from mechanical tasks that would disturb its regularity.
Quartz Clocks
Quartz crystal clocks were better because they had no gears or escapements to disturb their regular frequency. Even so, they still relied on a mechanical vibration whose frequency depended critically on the crystal's size and shape. Thus, no two crystals can be precisely alike, with exactly the same frequency. Such quartz clocks continue to dominate the market in numbers because their performance is excellent and they are inexpensive. But the timekeeping performance of quartz clocks has been substantially surpassed by atomic clocks.
