Brearley, Harry Chase, 1870-, Ingersoll, Robt. H., & Bro · New York, Pub. by Doubleday, Page & Co. for Robert H. Ingersol & Bros. · leaf 112
under the 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 4:2)2,000 interruptions. De Vicks escapement is shown… … 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. Ttmf Telling Through the Ages esting feature is its curious likeness in mechanical prin-ciple to the cloc cs of modem times. Like most eariy…
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-116-79.webp)
