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 333
extendingto the circle, as an index. Now, suppose the index n to be at o, in the upper part of thecircle, when the telescope is horizontal; then if the meridian altitude of the object to betaken is 10*, the index must be moved 10° from 0, as the degrees on the circle and thealtitude of the object… … TRANSIT INSTRUMENT, WASHINGTON, D. C. 704. This instrument is located in the National Observatoryat Washington, D. C. It is mounted upon piers of granite, whichrest firmly upon a foundation of stone, extending ten feet belowthe surface of the ground. The object-glass was furnished byMerz &…
Constellations · Stars
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