Young, Charles A. (Charles Augustus), 1834-1908, Young, Anne Sewell, b. 1871., ed · Boston, New York [etc.] Ginn and Company · leaf 50
ssing this wire, we have atonce the means of determining the error of the clock, becausethe sidereal time at that moment is equal to the stars rightascension (Art. 37). The difference between the right ascen-sion of the star as given in the almanac and the time shownby the face of the clock at the… … Fig. 14.— The Transit Instrument. § 58] DETERMINATION OF TIME. 37 ber of stars (from 8 to 10), reversing the instrument upon its pivotsonce at least during the operation. With a good instrument a skilledobserver can thus determine the clock error within about a thirtiethof a second of time,…
Astronomy · Constellations
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