Ball, R[obert] S[tawell], Sir, 1840- [from old catalog] · New York, H. Holt and company · leaf 56
-cury. Hence when themiddle wire coincideswith its reflected image,the axis of the telescopeis directed towards thecentre of the earth c. In the position a b the tele-scope is directed towards a star The angle s o crepresents the angle through which the telescope mustbe turned, in order to be moved… … 38 Astronomy. being the complement of the latit de is generallycalled the colatitude, and the angle qos, or the polardistance of the star, being equal to the sum of thezenith distance and the colatitude, is therefore known.The difference between the polar distance of the starand 900 is the…
Astronomy
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