Sharpless, Isaac, 1848-1920, Philips, G. M. (George Morris), 1851-1920, joint author · Philadelphia, J.B. Lippincott company · leaf 299
m. 1 A finder is a little telescope with a large field of view, by whichto find a star. As it will embrace a large circle of the heavens, thestar can be easily found and placed in the centre of the field of view.It can then be seen in the large telescope. A finder is indispensableto any telescope… … «£H£i5±£=2r- Fiu. 82.—Portable Transit Instrument. and the time recorded by an accurate sidereal clock,this clock will indicate 1 h. 27 m. If it do not, it isin error, and the amount of its error becomes known. ASTRONOMICAL INSTRUMENTS. 295 AVe thus have the opportunity of correcting our side-real…
Astronomy
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