Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York : H. Holt and company · leaf 69
Fig. 16 let iJ represent thezenith of the place of observation, Pthe pole, and HPZ R the me-ridian, the observer being at thecentre of the sphere. Suppose/Sand S to be the two pomtsat which a circumpolar starcrosses the meridian in tiie de-scription of its apparent diurnalorbit. Then, since P is… … ured by the meridian circle or the sextant—both of which instru-ments are described in the next chapter—and the latitude is thenknown. Z and Z must be freed from the effects of refraction. Inthis method no previous knowledge of the stars declination is re-(juired, provided it remains constant…
Astronomy
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
