Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 178
Fig. 113 Fig. 114 NESW is the horizon, Z the zenith,NZS the celestial meridian, WZE theprime vertical, WBE an arc of thecelestial equator, P the pole, M a star,DM its altitude, ZM its zenith dis-tance, Z PZM its azimuth, MR itsdeclination, PM its polar distance,Z ZPM its hour angle. SECTION LXVITI…
Trigonometry · Surveying · Navigation
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