a low one. If a cylinder of average thickness is desired foran escapement with medium impulse, its external diametermay be made equal to the extreme diameter of the escapewheel multiplied by 0.T15 66 THE MODERN CLOCK. Then to set out the escapement, if a Hft of say 30° bedecided on, a circle on… … \i^ \ \ < V30» -i
Clocks and watches
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![An illustration from The Mason Machine Works, Taunton, Massachusetts, U.S.A., inventors and builders of cotton machinery : Founded 1842 ; Incorporated 1873 ; [Catalogue] (1898)](https://img.insideoutlibrary.com/img/200/ia-masonmachinework00maso-119-40.webp)
