Horology

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

Hampton Court Clock
The story of the famous Astronomical clock at Hampton Court Palace. By the author of the original official guide books with the extra omitted information.
http://pages.zoom.co.uk/cosmicelk/hamptoncourtclock.htm

The History of Clocks and Watches
Learn about the history of clocks and watches, and discover the evolution of timekeeping devices from the first primitive sundials to the ultramodern atomic clocks. Includes a timeline.
http://home.rochester.rr.com/kjmpage/clockshistory.html

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

Horology.com
Horology is the science of time, timekeeping and timekeepers. Organized collection of links to horological websites globally.
http://www.horology.com/

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/

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/

"Orologio" at the St. Mark's Square Tower, Venice - Antica Orologeria Zamberlan
Website of Antica Orologeria Zamberlan, Italy. Includes technical and historical explanation of the restoration and controversy of the "Orologio" Tower at St. Mark's Square, Venice.
http://www.orologeria.com/english/tower/index.htm

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

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