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reconstruction of the waterpowered mechanical clock
How do atomic clocks work?
weight-driven clock works Great Clock, Rouen, Fr. components in a watch anchor escapement of a clock clock verge-and-foliot clock mechanism components of a weight-driven clock quartz clock mechanism
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barometer. Antique Barometer with readout. Technology measurement, mathematics, measure atmospheric pressure
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"Landing of Columbus" by John Vanderlyn, oil on canvas; commissioned 1836/1837, placed 1847. In the rotunda of the U.S. Capitol, Washington, D.C. 12' x 18' ft. (3.66 m. x 5.49 m.) Christopher Columbus and members of his crew are shown on a beach
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Queen Elizabeth II addresses at opening of Parliament. (Date unknown on photo, but may be 1958, the first time the opening of Parliament was filmed.)
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Flags of the countries of the world (flagpoles).
How Many Countries Are There in the World?
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Russian grand duchess Anastasia; undated photograph. (Anastasiya Nikolayevna, Tsar Nicholas II)
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Photos and Videos

reconstruction of the waterpowered mechanical clock
weight-driven clock works
Great Clock, Rouen, Fr.
components in a watch
anchor escapement of a clock
clock
verge-and-foliot clock mechanism
components of a weight-driven clock
quartz clock mechanism
Greenwich Mean Time
How do atomic clocks work?
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Related Topics and References

Topics

Key People

Edward John Dent
British clockmaker
Bracket clock with oak case, ebony veneer, and gilt bronze mounts by Thomas Tompion, c. 1690; in the Victoria and Albert Museum, London.
Thomas Tompion
English clockmaker
banjo clock
Simon Willard
American clockmaker
Edmund Beckett, 1st Baron Grimthorpe
British horologist
Off-centre pillar-and-scroll wooden clock by Seth Thomas, c. 1818, under license from Eli Terry; in the American Clock and Watch Museum, Bristol, Connecticut.
Seth Thomas
American clockmaker
John Harrison, detail of an oil painting by Thomas King; in the Science Museum, London
John Harrison
British horologist
Chauncey Jerome clock
Chauncey Jerome
American inventor
Off-centre pillar-and-scroll wooden clock by Seth Thomas, c. 1818, under license from Eli Terry; in the American Clock and Watch Museum, Bristol, Connecticut.
Eli Terry
American craftsman
Quare, Daniel: Queen Ann clock
Daniel Quare
English clockmaker and inventor
Ferdinand Berthoud
French horologist

Related Quizzes and Features

Quiz
barometer. Antique Barometer with readout. Technology measurement, mathematics, measure atmospheric pressure
Fun Facts of Measurement & Math
List
Calendar marking march 15th
22 Questions About Time and Timekeeping Answered