The geography of the heavens and classbook of astronomy; (1863)
Burritt, Elijah H. (Elijah Hinsdale), 1794-1838, Mattison, Hiram, 1811-1868, Whitall, Henry, 1819-1887? Celestial planisphere. [from old catalog] · New York, Mason brothers; Boston, Mason & Hamlin; [etc., etc.] · leaf 329
, and se-conds on the circle areread by means of microscopes, and indicate the altitude of theobject. In the cut, A is a reading microscope firmly attached to the wall, and B C D E thewall to which the circle is attached. The telescope would denote an altitude of about40°, which would leave 50° as… … 328 ASTKONOMY. CHAPTER XX.PROBLEMS AND TABLES. PROBLEM I.TO CONVERT DEGREES, ETC., INTO TIME. Rule I.—Divide the degrees by 15, for hours ; and multiply theremainder, if any, by 4, for minutes. 2. Divide the odd minutes and seconds in the same manner by15 for minutes, seconds, <fec., and…
Constellations · Stars
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