American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 120
t becomes necessary for the work-man who desires to do accurate work, bothscientific and practical, that he be providedwith a set of good measuring instruments,such as have been described in previousnumbers of the Journal, based upon themetrical system, for without such he is likea ship at sea… … for most persons the graphic way is the mostconvenient. For making a good and accurate drawingof an escapement, and to make the necessaryrules very plain, the escapement is drawnmuch larger than the natural size, becausethe lines of very small angles, as for instance1° or 1|°, would nearly coincide…
Clocks and watches
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