The elements of theoretical and descriptive astronomy, for the use of colleges and academies (1872)
White, Charles J. (Charles Joyce), 1839-1917 · Philadelphia, Claxton, Remsen & Haffelfinger · leaf 52
by the position of the zero point of the vernier.If, now, the zero point of the vernier exactly coincides with adivision of the limb, the point 1 of the vernier will fall V behindthe next division of the limb, the point 2 will fall 2 behind thenext division but one, and so on; and if, such being… … VERNIER. 47 dence with a division on the limb; and, in general, the numberof minutes of arc by which the zero point of the vernier fallsbeyond the division of the limb which immediately precedes itwill be equal to the number of that point of the vernier whichis in coincidence with a division of the…
Astronomy
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