A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1859)
Mattison, Hiram, 1811-1868 · New York, Mason brothers · leaf 228
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. wound the horizon; while the joint, connecting the saddle in which the telescope rest*with 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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