A text-book of general astronomy : for colleges and scientific schools (1888)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston ; London : Ginn & Company · leaf 61
titude and azimuth instrument is simply a surveyors theodo-lite on a large scale. It has a horizontal circle turning upon a verti-cal axis, and read by verniers or microscopes. Upon this circle, andturning with it, are supports which carry the horizontal axis of thetelescope with its vertical… … Fig. 24. — Altitude and Azimuth Instrument. and azimuth of the body pointed on. Fig. 24 represents a small in-strument of this kind l>v Fauth & Co. ASTRONOMICAL INSTRUMENTS. 49 72. The Equatorial.— The essential characteristic of this instrumentis that its principal axis, i.e., the axis…
Astronomy
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