Brearley, Harry Chase, 1870-, Ingersoll, Robt. H., & Bro · New York, Pub. by Doubleday, Page & Co. for Robert H. Ingersol & Bros. · leaf 108
he urge of the mainspring, it startsforward. The frequency and duration of these interruptionsdetermines the rate of running. Without this, the move-ment would run down swiftly; with it, the operationstretches over thirty hours, involving 432,000 interruptions. De Vicks escapement is shown in the… … A Time Piece of the Middle Ages The huge and elaborate Clock of Strasbourg Cathedral, inLorraine, was built in 1352 and is an example of the first clocks. me Telling Through the A rg feature is its curious likeness in mechanical prin-ce to the clock rn times. Like most early clocks,is only oi - the…
Time measurements · Clocks and watches
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![An illustration from XIV [i.e. Vierzehnter] Verbandstag Verband deutscher Juweliere, Gold- & Silberschmiede Strassburg, vom 7.-11. August 1914 : verbunden mit einer Ausstellung alter & neuer Goldschmiedearbeiten und Uhren (1914)](https://img.insideoutlibrary.com/img/200/ia-xivievierzehnter00stra-114-78.webp)
