The geography of the heavens : and class-book of astronomy : accompanied by a celestial atlas (1860)
Burritt, Elijah H. (Elijah Hinsdale), 1794-1838, Mattison, Hiram, 1811-1868 · New York : Mason Brothers · leaf 330
y bodies, at the instantof their crossing themeridian. They areusually fixed upon ahorizontal axis, thatturns in a socket firmlyfixed in a north andsouth wall. The de-grees, minutes, and se-conds on the circle areread by means of microscopes, and indicate the altitude of theobject. In the cut, A is… … 711. An astronomical clock? How set? How indicate right ascension of objects?712. Describe a mural circle? Its uses 1 How mounted? How ascertain altitude andeenith distances by it? &28 ASTRONOMY. CHAPTER XX. PROBLEMS AND TABLES. PROBLEM I.TO CONVERT DEGREES, ETC., INTO TIME. Rule I.—Divide the…
Constellations · Stars
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