A popular handbook and atlas of astronomy, designed as a complete guide to a knowledge of the heavenly bodies and as an aid to those possessing telescopes (1891)
Peck, William, Sir, 1862-1925 · New York, G. P. Putnam's Sons · leaf 167
Fig. 33. thecompensatedpendulum. s,Suspensio nSpring; C, Jar of Mer-cury y L, Cylinder ofLead. 104 A POPULAR HANDBOOK AND ATLAS OF ASTRONOMY. … Fig. 34. the equatorial telescope. placed exactly parallel to the axis of the earth, and, therefore, by one movement, the instrument can follow theapparent course of an object produced by the rotation of our globe. Passing through the polar axis, and lyingat right angles to it is another one called…
Astronomy
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