horology

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horology

(hōrŏl`əjē), science of measuring timetime,
sequential arrangement of all events, or the interval between two events in such a sequence. The concept of time may be discussed on several different levels: physical, psychological, philosophical and scientific, and biological.
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 and technology of constructing instruments for its measurement or recording. Early measurements of the passage of time were based on observations of seasonal cycles and of the apparent motion of celestial bodies. Shorter intervals were measured by observing the shadow cast by an upright object; the shadow clock and the sundialsundial,
instrument that indicates the time of day by the shadow, cast on a surface marked to show hours or fractions of hours, of an object on which the sun's rays fall.
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 were probably the first devices constructed. Later came the hourglasshourglass,
glass instrument for measuring time, usually consisting of two bulbs united by a narrow neck. One bulb is filled with fine sand that runs through the neck into the other bulb in an hour's time. The date of its invention is unknown, but it was in use in ancient times.
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 and the clepsydraclepsydra
or water clock,
ancient device for measuring time by means of the flow of water from a container. A simple form of clepsydra was an earthenware vessel with a small opening through which the water dripped; as the water level dropped, it exposed marks on the
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 and finally the clockclock,
instrument for measuring and indicating time. Predecessors of the clock were the sundial, the hourglass, and the clepsydra. See also watch. The Evolution of Mechanical Clocks
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 and the watchwatch,
small, portable timepiece usually designed to be worn on the person. Other kinds of timepieces are generally referred to as clocks. At one time it was generally believed that the first watches were made in Nuremburg, Germany, c.1500.
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. The most accurate type of timekeeping device in existence today is the atomic clockatomic clock,
electric or electronic timekeeping device that is controlled by atomic or molecular oscillations. A timekeeping device must contain or be connected to some apparatus that oscillates at a uniform rate to control the rate of movement of its hands or the rate of
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. Highly accurate time, which is necessary for such purposes as navigation and the tracking of artificial satellites, is provided throughout the world by time signals that are transmitted by certain radio stations.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/

horology

[hə′räl·ə·jē]
(science and technology)
The science of measuring time and the technology of constructing instruments for this measurement.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
By Salwa Samir - The Egyptian Gazette It is one of the oldest horologist's shops in Egypt, as evidenced in its design and decor.
Horologist Michael - who runs the House of Automata store in Kinloss, Moray, with wife Maria - was aware of the tale, which is based on Brian Selznik's book The Invention Of Hugo Cabret.
Key exhibitors at INDEX include: 4 Homes, Airstar Space Lighting, Alpha Crystal, Amber Gallery, Archimedia, Avenue, B.LAB ITALIA, Delta Faucet, DL Decor, Ecosmart, EGO Paris, Fabbian Illuminazione, Garden Light, Gea Luce, Hansgrohe, Harbour Outdoor, Harem, ILID, Jardin d'Ulysse, Johnson Tiles, Jordi Mila, Kafka Goes, Pink, Kermi, Kohler, Kollektion, Laufen, Lelievre, Leto Appliances, LP Vietnam, Maison D'Art, Mattar Bin Lahej, Neil Corder, Nobilis, PF Emirates, Poliedrica, Porada Arredi, Preciosa, RAME, Razzeti Errepi, Rivoli Silks, Roca, Rubelli, Scavolini, Silvan Floors, The Horologist, The Kontainer, Toto, Trevi, Ulusal and Zeitraum.
The horologist, John Harrison (1693-1776), did indeed develop the bi-metal balance spring and although he received several payments for his efforts, he did not win the official pounds 20,000 prize.
Beckett is descended from the first Lord Grimthorpe, a remarkable Victorian who was a QC, architect and amateur horologist. He says: "He invented a thing called the 'double three-legged gravity escapement' which was used for the great clock of Westminster we call Big Ben, although that is the name of the bell.
Horologist Mark Crangle repairs the clock mechanism in the bell tower; and, right, project manager Michael McDermott at the back of one of the clock faces
Focusing on introspection rather than dialogue, Harding also plays with time, interrupting the narrative with stream-of-consciousness musings, present-tense passages, and entries from The Reasonable Horologist, a fictional clock-repair manual from 1783.
Horologist Matthew Read and his team carefully dismantled, photographed and documented more than 1,000 pieces which make up the life-size musical automaton, before starting the process in reverse.
John M'Cabe, the Baltimore horologist, made electrical machines, as the clockmaker William Clagett, of Boston, provided electrical devices and demonstrations fundamental to his trade (Delbourgo, p.
With Britain's wresting of Guyana from Holland in the late eighteenth century came what appears to be the nation's earliest public clock, a single-dialed version obtained from the eminent London horologist, Paul Phillipe Barraud.
Be sure to follow the link to the Java Clock Shop at http://www-cargobay.com/clockshop, which fascinated my 5-year-old horologist for close to an hour.
Frank Hope-Jones, a leading horologist of the time, wrote that it would be "downright wicked for us as a country of origin of standard time [ie Greenwich Mean Time] to destroy the unanimity that so many nations have gone out of their way to bring about".