Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 186
the next lower line of the rod.4 of the vernier is y^ of a foot above the next lower line of the rod.3 of the vernier is j^ of a foot above the next lower line of the rod.2 of the vernier is j^ of a foot above the next lower line of the rod.1 of the vernier is j^/fo of a foot above the next lower… … Fig. II. Oompass Verniers. Let LL1 (Fig. 11) represent the limb ofthe compass graduated to half-degrees, and W1 the vernierdivided into thirty equal spaces, equal to twenty-nine spacesof the limb. Then one space of the vernier is less than onespace of the limb by 1, and the reading may be obtained…
Trigonometry · Surveying · Navigation
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