American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 203
27. It will be easily understood that a watch, the escapement and depths of which I are imperfect, and made in a careless way, ! will require a powerful main-spring, while in ! a carefully made watch, the judicious utilizing 194 AMERICAN HOROLOGICAL JOURNAL. of space in the barrel will allow of… … suppleness, is less liable to accident, and, bythe number of turns it makes in the barrel,affords the advantageous resource of select-ing the middle turns of the development ofthe sprkig for the daily march of the move-ment, and thus to obtain a greater uniformityof motive power. 28. It will also…
Clocks and watches
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