Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt and Company · leaf 66
iurnal circuit? Ans. Above, 2152 j below,2 8. §11. DETERMINATION OP LATITUDES ON THEEARTH BY ASTRONOMICAL OBSERVATIONS. Latitude from circumpolar stars.—In Fig. 16 let ^ represent thezenith of the place of observation, P the pole, and HPZ R the me-ridian, the observer being at thecentre of the… … If, then, we can measure the dis-tances Z and Z\ we have which serves to determine ^. The distances if and Z can be meas- 48 ASTRONOMY. ured by the meridian circle or the sextant—both of which instru-ments are described in the next chapter—and the latitude is thenknown. ^ and Z must be freed from…
Astronomy
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