Web Directory

» 24 hour analog clocks
   The 24 hour analog clock and watch site. History, software, and the places to find clocks with 24 h dials.
   http://homepage.mac.com/pete.boardman/24hourclock/

» Abbey Clock Clinic - Mark Headrick's Horology Page
   Traditional horology website with information and mantainance tips. Technical descriptions and troubleshooting of escapements. Grandfather clocks, wall clocks, and watches.
   http://www.abbeyclock.com/

» Allan Variance -- Overview by David W. Allan
   Core algorithm of international time scale has multiple metrology applications, from atomic clock frequency characterization to definition of the meter. Equation, explanation and publications.
   http://www.allanstime.com/AllanVariance/

» Antique Horology
   The Horological Foundation's directory of web sites for watches, clocks, instruments and barometers.
   http://www.antique-horology.org/

» Clocks and Time
   Horological index for organizations, clock and watch museums, related software, mailing lists and links. Maintained by Gordon T. Uber.
   http://www.ubr.com/clocks/

» Cumbria Clock Company
   Company specialized in all aspects of work connected with church clocks, public clocks, and tower clocks which includes the full historical restoration of antique clock movements.
   http://www.clockmaker.co.uk

» David Knight - Watchmaker from UK
   Articles and pictures of the first two watches made by David Knight. Rich artistic pictures.
   http://www.davidknightwatchmaker.com/

» Daylight Saving Time
   History of daylight saving time and how we use it to save energy.
   http://webexhibits.org/daylightsaving/

» Functionning of a Simple Mechanical Watch
   Explanation of the roles of components of a wristwatch.
   http://collectorebooks.com/watch2/watch01.htm

» Horology - The Index
   Horology is the science of time, timekeeping and timekeepers. Organized collection of links to horological websites globally.
   http://www.nawcc-index.net/

» How Stuff Works: Time
   Complete five-part explanation of time and how it is measured, including information about clocks, time zones, calendars, BC and AD.
   http://www.howstuffworks.com/time.htm

» How The Days of the Week Got Their Names
   A short history of the week and each day of the week.
   http://www.indepthinfo.com/weekdays/index.shtml

» Jens Olsen's Astronomical Clock
   Description of the restoration of Jens Olsen's Astronomical Clock, a masterpiece in Copenhagen City Hall that consists of 15.448 individual parts.
   http://www.ateliera.dk/olsen.htm

» Leap Year Calculation for Year 2000
   A response to a VMS problem report giving a detailed explanation of why 2000 is a leap year.
   http://h71000.www7.hp.com/openvms/products/year-2000/leap.html

» Louis Essen
   Autobiography of the physicist who built the world's first operational atomic clock.
   http://www.btinternet.com/~time.lord/

» Mark Frank's Home Page
   Website showing the restoration of a French flat bed tower clock in great detail, step by step, as well as other information and links of tower clock sites.
   http://www.my-time-machines.net

» National Association of Watch and Clock Collectors
   Organization of watch and clock enthusiasts.
   http://www.nawcc.org

» On Time
   The Smithsonian Institute's exhibition on the changing ways we have measured, used, and thought about time over the past three hundred years.
   http://americanhistory.si.edu/ontime/

» Pocket Horology
   National chapter of the NAWCC dedicated to collaborative research on the history and horology of pocket watches.
   http://www.pockethorology.org/

» The Horology Source
   Gateway to all aspects of clocks, watches, timekeeping, and the science of horology.
   http://www.horologysource.com

» UNITAS Reference Site
   UNITAS wristwatch and pocketwatch movements from 1898 to the present.
   http://www.unitas.netfirms.com