Chambers's encyclopædia; a dictionary of universal knowledge . ock with works nearly100 years old keeping time with astronomicalaccuracy. In the same way, a clock in the castleof Edinbiirgh, by whose mechanism a gun is firedprecisely at one oclock every day, is controlled bythe mean-time clock in the observatory on theCalton Hill. To such perfection has the art ofpublication, as well as the keeping of correct time,been now brought. It is not known when the alarm, or when thestriking-mechanism of the clock was first alarm was adopted for the use of the priest-hood, to arouse them to
Chambers's encyclopædia; a dictionary of universal knowledge . ock with works nearly100 years old keeping time with astronomicalaccuracy. In the same way, a clock in the castleof Edinbiirgh, by whose mechanism a gun is firedprecisely at one oclock every day, is controlled bythe mean-time clock in the observatory on theCalton Hill. To such perfection has the art ofpublication, as well as the keeping of correct time,been now brought. It is not known when the alarm, or when thestriking-mechanism of the clock was first alarm was adopted for the use of the priest-hood, to arouse them to their morning first striking-clock probably aimounced thehour by a single blow, as they still do, to avoidnoise in churches. In De Wycks clock, the wheelN, with its projecting pins, served to dischargethe striking part (not represented in the figure).Ditring the 17th c, there existed a great taste forstriking-clocks, and hence a great variety of of Tompions clocks not only struck thequarters on eight bells, but also the hour after. Fig. 4.—Horologe:Presented by Uenry VIII. to Anne Boleyn. each quarter; at twelve oclock, 44 blows werestruck; and between twelve and one, no less than113! Many struck the hour twice, like that ofSt Clement Danes, in the Strand, London, first on alarge bell, and then on a small one. Others, again,were invented so as to tell the hours with the leastpossible noise; also by the aid of two beUs, eachblow on the small one indicating five hours. The striking part of a clock is rather a peculiarand intricate piece of mechanism. In ordinaryclocks, the impelling power is a weight similar tothat which moves the time-measuring mechanismitself; but the pressiu-e of this weight on the strik-ing-machinery is only permitted to come into play at stated periods in course of the workings of thetime-keei)ing apparatus—viz., at the completion ofevery hour; when the minute-wheel, which revolvesonce in an hour, and carries the minute-hand
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Keywords: ., bookcentury1800, bookdecade1860, bookpublisherlondo, bookyear1868
