Astronomy, a handy manual for students and others (1918)
Dyson, Frank Watson, Sir, 1868-1939 · New York, E.P. Dutton & Co. · leaf 77
its distance from thezenith and the distance of the zenith from the pole.In Diagram XXXIII sP = sZ + ZP. Now ZP is thesame for all stars, and is obtained by subtracting thelatitude of the place of observation from 900. Thedirection of Z is the direction of a plumb line, so that 66 ASTRONOMY to find…
Astronomy
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