Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt · leaf 101
Fig. 33. 82 ASTRONOMY. the same as that of (n—1) parts on the divided limb M Nor 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… … Fig. 34.—the vernier. Call the angular value of one division on the vernier d!\ n \ i (n — l)d = n-d\ord/ = d, 2rt\did—df=-d\ d — d is called the least count of the vernier which is onenth part of a circle division. If the zero a does not fall exactly on a division on thecircle, but is at some…
Astronomy
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