American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 259
se of which is rigidly limited to veri-fication. All taps or dies for use must coincidewith this gauge, and as they are in constantuse, and must sooner or later deteriorate, theexaminers frequently test the products by thestandard to insure continued coincidence. Thescrew-making lathes all have… … An important adjunct to many of the lathesand machines in the watch factory is a tail stock,swinging at right angles to the line of the latheabout a, Fig. 1, as a centre of revolution, carry-ing arbors or mandrels through p, m, d, parallelto each other and to the lathe bed, each having upon its end…
Clocks and watches
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