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Allan Variance -- Overview by David W. Allan - http://www.allanstime.com/AllanVariance/
Core algorithm of international time scale has multiple metrology applications, from atomic clock frequency characterization to definition of the meter. Equation, explanation and publications. |
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Jens Olsen's Astronomical Clock - http://www.ateliera.dk/olsen.htm
Description of the restoration of Jens Olsen's Astronomical Clock, a masterpiece in Copenhagen City Hall that consists of 15.448 individual parts. |
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Leap Year Calculation for Year 2000 - http://h71000.www7.hp.com/openvms/products/year-2000/leap.html
A response to a VMS problem report giving a detailed explanation of why 2000 is a leap year. |
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Clocks and Time - http://www.ubr.com/clocks/
Horological index for organizations, clock and watch museums, related software, mailing lists and links. Maintained by Gordon T. Uber. |
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How Stuff Works: Time - http://www.howstuffworks.com/time.htm
Complete five-part explanation of time and how it is measured, including information about clocks, time zones, calendars, BC and AD. |
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Ludwig Oechslin - http://www.ulysse-nardin.com/index2.jsp?ID_Page=10000L
Curator at the Musée International d’Horlogerie (international watch museum) in La Chaux- de - Fonds, Switzerland. He has designed some of the most complex wristwatches in history. |
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UNITAS Reference Site - http://www.unitas.netfirms.com
UNITAS wristwatch and pocketwatch movements from 1898 to the present. |
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Abbey Clock Clinic - Mark Headrick's Horology Page - http://www.abbeyclock.com/
Traditional horology website with information and mantainance tips. Technical descriptions and troubleshooting of escapements. Grandfather clocks, wall clocks, and watches. |
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Mark Frank's Home Page - http://www.my-time-machines.net
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. |
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"Orologio" at the St. Mark's Square Tower, Venice - Antica Orologeria Zamberlan - http://www.orologeria.com/english/tower/index.htm
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. |
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24 hour analog clocks - http://homepage.mac.com/pete.boardman/24hourclock/
The 24 hour analog clock and watch site. History, software, and the places to find clocks with 24 h dials. |
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Cumbria Clock Company - http://www.clockmaker.co.uk
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. |
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Pocket Horology - http://www.pockethorology.org/
National chapter of the NAWCC dedicated to collaborative research on the history and horology of pocket watches. |
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David Knight - Watchmaker from UK - http://www.davidknightwatchmaker.com/
Articles and pictures of the first two watches made by David Knight. Rich artistic pictures. |
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The Horology Source - http://www.horologysource.com
Gateway to all aspects of clocks, watches, timekeeping, and the science of horology. |