A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1853)
Mattison, Hiram, 1811-1868 · New York, F. J. Huntingdon [etc.] · leaf 227
est form of a mountedrefractor. The object-glass is atA, where the brass cap may beseen covering it. B is the smalltube into which the eye-pieceis screwed, and which is movedin and out by the small screwC. Two eye-pieces may be seenat D—one short one, for astro-nomical observations; and along one,… … 518. How object-glass protected? What said of eye-pieces? (Cut andexplanation ?) 224 ASTRONOMY. around the horizon; while the joint, connecting the saddle in which the telescope restswith the top of the bolt, allows it to be directed to any point between the horizon andthe zenith. But such stands…
Astronomy
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