Technology

*Date*	*Place*	*Event*
4000	Babylon	Copper alloys used: smelting of gold and silver.
	Egypt	Copper alloys used: smelting of gold and silver.
3500	Babylon	Wheeled vehicles used.
	Egypt	Plowing, raking, and manuring.
	Middle East	Linen Produced
	Mesopotamia	Potter's Wheel in use.
3000	Europe	Weaving loom known.
	Sumer	Oil burning lamps in use.
2750	Egypt	Metal mirrors in use.
	Sumer	Manufacture of metal objects.
2500	Babylon	Potter's wheels & kilns in use.
		Bow & arrow used in warfare.
2300	Egypt	Egyptian ships import gold from Africa.
2000	Egypt	Use of knotted rope triangle with "Pythagorean" numbers to construct right angles.
		Minos palace has light and air shafts, bathrooms with water supply.
	Egypt	Use of contraceptives.
	Egypt	Use of horses to draw vehicles.
	Babylon	Highly developed geometry used as basis for astronomic measurements; signs of zodiac known.
1880	Egypt	Thutmose I builds first tomb in Valley of Kings.
1750	Crete	Decimal system in use.
	India	Water dam built of polished marble.
	Egypt	Use of mercury.
1500	Egypt	Intricate clock, measuring flow of water.
	China	Mathematical permutations and "magic squares."
	China	Properties of Pythagorean triangle theory known.
1193	China	Silk fabrics.
1002	Mexico	Sun Pyramid built in Teotihuacan.
	Assur	Monumental tower temples built.
1000	Greece	Earliest use of iron in Greece.
960	Israel	Water supply system through reinforced subterranean tunnels built in Jerusalem.
950	Babylon	Chaldeans use water-filled cube for measuring time, weight, and length.
	Europe	Gold vessels and jewelry in use in north.
879		Bronze doors and black obelisk at palace in Balawat are evidence of highly developed metal & stone sculpture.
800		First iron utensils.
746	Europe	Hallstatt culture uses spoked-wheels & horseshoes.
	Assyria	Animal bladders used as swimming aids in warfare.
630		Glaucus of Chios invents soldering of iron.
551	India	Dams are being constructed.
536	Athens	1st water supply system has nine pipes leading to main well.
500	Persia	Darius I uses pontoon bridge across Bosphorus during warfare.
445	Greece	Use of carrier pigeons.
400		Use of catapults as weapons of war.
377	Rome	Walls built around city.
356	China	China begins building the Great Wall against Huns.
350	India	Rain measured.
350	China	Iron used as working material.
338	Rome	First coins.
275	Alexandria	Completion of lighthouse at Pharos.
250		Eratosthenes suggests that the earth moves around the sun and maps out the course of the Nile; also makes close estimates of the earth's circumference.
230	Greece	Oil lamps introduced.
221	China	Unification of all measurers & weights.
215	China	Great Wall (1400 miles long) built to keep out invaders.
200		Use of gears leads to invention of ox-driven water wheel for irrigation.
179	Rome	1st stone bridge, Pons Aemilius.
159	Rome	The first water clock (clepsydra).
140		Crates of Mallus forms his great globe of the world.
100	India	Erection of the Great Stupa at Sanchi.
43	China	Ch'ien Han Shu is the first person to record sunspots.
38	China	Octave is subdivided into 60 notes.
20	Rome	The Millearium aureum erected in the Via Sacra (names, and distances from Rome, of the chief towns in the Empire).