Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 148
Figs. 46 and 47. InFig. 46, AVBU is the equinoctial, P and P its poles, NPZSthe celestial meridian of an observer, NESWhis horizon, Zhis zenith, M a star, PMP the hour circle passing throughthe star, ZMDZ1 the vertical through the star. APPLICATIONS. 139 In Fig. 47, AVBTJ represents the… … 8 A
Trigonometry · Surveying · Navigation
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