Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt and Company · leaf 101
82 ASTRONOMY. the same as that of {n—1) parts on the divided hmb M iVor the reverse. The first stroke a is the zero of the vernier, and thereading is always determined by the position of this zeroor pointer. If this has revolved past exactly twenty di-visions of the circle, then the angle to be… … Fig. 34.—the vernier. Call the angular value of one division on the vernier d\ (n — l)d = nd\ord = d,SiTidd—d=-d; d — d\^ called the least count of the vernier which is onen*** part of a circle division. If the zero a does not fall exactly on a division on thecircle, but is at some other point (as…
Astronomy
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