Watches : the Paul M. Chamberlain collection at the Art Institute of Chicago (1921)
Art Institute of Chicago · Chicago : The Institute · leaf 10
of this marvel hasbeen primarily the object of collecting theexamples herein briefly described. For the information of the layman, itmay be well to point out that the watchmovement consists of a motor or storagebattery, the mainspring, the train of gearedwheels large and small, (the latter… … No. 5—ACTION OF CHINESE DU-PLEX the second wheel carries the minute hand,the third wheel has no function but to in-crease the ratio of the train, the fourthwheel carries the seconds hand, and thencomes the escape wheel, which can moveonly as fast as the escapement or soul ofthe watch will allow. It…
Chamberlain, Paul Mellen, 1865-1940 · Clocks and watches
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