Willson, Robert Wheeler, 1853-1922 · Boston, New York Ginn & company · leaf 48
raduated from 0°to 90° in opposite directions.Attached to thecircle is a tele-scope whose op-tical axis is inthe plane of thecircle. The cir-cle is read bya pointer whichis fixed to the frame carrying its axis and reads 0° when the optical axis of thetelescope is perpendicular to the upright axis.… … Rg. 31 36 LABORATORY ASTRONOMY ADJUSTMENT OF THE ALTAZIMUTH If the altazimuth is so adjusted that the upright axis is exactlyvertical, and if we know the reading of the horizontal circle whenthe vertical circle lies in the meridian, we may determine theposition of a heavenly body at any time by…
Astronomy
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
