An introduction to astronomy : designed as a text book for the students of Yale College (1846)
Olmsted, Denison, 1791-1859, Yale College (1718-1887) · New York : Collins, Brother & Co. · leaf 75
8th division of the vernier.Now as the vernier gains ^\ of yV=T^oof an inch at each division upward, it ofcourse gains ^1^ in eight divisions. The fractional quantity, there-fore, is .08 of an inch, and the height of the mercury is 30.38. Ifthe divisions of the vernier were such, that each gained… … 25) 120. The instruments most used for astronomical observations,are the Transit Instrument, the Astronomical Clock, the MuralCircle, and the Sextant. A large portion of all the observations,made in an astronomical observatory, are taken on the meridian.When a heavenly body is on the meridian,…
Astronomy
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