Timeline of Time Keeping

By Carolyne Britt
  • 100

    Sundial

    Egypt 1500 BCE Oldest Surving Sundial</a>http://www.wijzerweb.be/egypteengels.html
  • 100

    Water Clock

    China 4000 BCE Cowan, Harrison J. (1958). "Time and Its Measurement: From the stone age to the nuclear age". Ohio: The World Publishing Company. p. 58
  • 100

    Tally Stick

    Upper Paleolithic 18,000 BCE Baxter, T. W. (1989). "Early Accounting, The Tally and the Checkerboard". The Accounting Historians Journal 16: 43–83.
  • 150

    Hourglass

    Earliest evidence 150 BCE American Institute of the City of New York (1870). Annual Report of the American Institute of the City of New York. C. van Benthuysen. pp. 1042–.
  • 520

    Candle Clock

    China 520 CE Turner, Anthony J. The Time Museum, Volume I, Time Measuring Instruments; Part 3, Water-clocks, Sand-glasses, Fire-clocks
  • Jan 11, 1285

    Mechanical Clock with escapement

    Europe 1285 CE Baillie, G.H., O. Clutton, & C.A. Ilbert. Britten’s Old Clocks and Watches and Their Makers (7th ed.). Bonanza Books (1956).

  • Pendulum Clock

    1656 by Christiaan Huygens Milham, Willis I. (1945). Time and Timekeepers. New York: MacMillan. ISBN 0-7808-0008-7., p.330, 334

  • Quartz Clock

    Invented 1927 by Warren Marrison and J.W. Horton at Bell Telephone Laboratories Marrison, Warren (1948). "The Evolution of the Quartz Crystal Clock". Bell System Technical Journal (AT&T) 27: 510–588. doi:10.1002/j.1538-7305.1948.tb01343.x.