The geography of the heavens, and class-book of astronomy: accompanied by a celestial atlas (1873)
Burritt, Elijah H. (Elijah Hinsdale), 1794-1838, Mattison, Hiram, 1811-1868, ed, Whitall, Henry, 1819-1887? Celestial planisphere · New York, Sheldon & company · leaf 330
servatory, at Albany, and is one of the most important instru-ments in America. Its focal length is 15 feet 2 inches. Theobject-glass, made by the late Henry Fitz, of New York, is 13inches clear aperture, and the tube is of mahogany, constructedby glueing together strips of about an inch in width.… … TUE GREAT EQUATORIAL REFRACTOR AT CAMBRIDGE MASS. 701. This is probably the best instrument m the United Sttatet>.Its object-glass is 15 inches in diameter, with a focal length of22 feet 6 incites. It has eighteen different powers, ranging from103 to 2.000. It was made by Merz & Mahler, of…
Constellations · Stars
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