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.

horology

[hə′räl·ə·jē]
(science and technology)
The science of measuring time and the technology of constructing instruments for this measurement.
References in periodicals archive ?
Knowing that Writer Christianson is a capable craftsman who has served as president of the American Watchmakers and Clockmakers Institute, that he not only mentors regarding clock and watch restoration, and is a Fellow of the British Horological Institute, but that he also writes for Professional Jeweler and Watchmaking publications lends much to his credibility.
He was a former Master of the Clockmakers' Company of London and had been awarded their Gold Medal, a rare honour, as well as the Gold Medal of the British Horological Institute, the Gold Medal of the City of London and the Kullberg Medal of the Stockholm Watchmakers' Guild.
While the fantasy that is Harry Potter rolls on, the clock, tucked away in storage at Smith's factory, the very real clock stands among other horological curiosities as a point of passing interest to the occasional visitor who is lucky enough to tour the 156-year-old company.
The champions, selected from more than 210 entries, included Wincy Horological Ltd's "10.
But when he left his business, he gained a formal horological accreditation and took a British Horological Institute course at Birmingham City University, before launching The Atelier shop in Alcester.
1) They claim instead that the early modern English, like their West European neighbors, enjoyed a circumstantial horological awareness, with attendant temporal competencies, going back to the fifteenth century or earlier.
Senior horological conservator Robert Ball said the operation was months in the planning.
Our founder, the American Florentine Ariosto Jones, had the vision in 1868 of using Swiss horological craftsmanship to produce high-quality pocket watch movements for the American market.
In Geneva on 7 May, meanwhile, the Breguet Museum acquired what specialist auctioneers Patrizzi & Co described as the 'most important horological document in existence' for a record-breaking CHF2.
It was not long, however, before Longines' craftsmen were concentrating their watchmaking know-how on models for the finer wrists of women, bringing a new horological aspect to Art Deco that exuded elegance and charm.
Prof Stephen Hawking, author of A Brief History of Time, was guest of honour at a ceremony to mark the creation of The Corpus Clock, a EUR1m horological sculpture erected in Cambridge.
In "The History Of Watches", author David Thompson (Curator of the Horological collections in the Department of Prehistory & Europe at the British Museum) collaborates with Saul Peckham (a photographer for the British Museum for twenty years) to produce a visually stunning, highly informative, authoritative overview of timepieces ranging over the past five hundred years.