Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 157
o plain that the desired mounting must be so contrivedthat the telescope can be set to any and every declination.Such a mounting would be used: 1st. By setting the telescope to the declination of thestar we wished to examine: 2d. By following that star as long as we pleased by ro-tating the… … Fig. 78a. — The 36-inch Refractor of the Lick Observatory of theUniversity of California. ASTRONOMICAL INSTRUMENTS. 137 The lines drawn in the different cones A, B, C, D, representdifferent positions of the telescope. The circles A, B, 0, D,are different parallels of declination. Suppose then that…
Astronomy
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