to the cylinder. With the advantages of accuratemicrometer calipers now possessed by the horological student it isan easy matter to get at the angular extent of the real lift of anycylinder. The advantage of such measuring instruments is alsomade manifest in determining when the proper proportion… … 120 Watch and Clock Escapements. of the outer diameter of the cylinder, and at the same time thetrade was furnished with no tools except a clumsy douzieme gage ;but with micrometer calipers which read to one-thousandths of aninch such rules can be definitely carried into effect and not left to…
Clocks and watches
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