Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt · leaf 98
THE TRANSIT INSTRUMENT. 79 … exact second by the clock (which is always near the ob-server, beating seconds audibly), this second must be writ-ten down as the time of the transit over this thread. Asa rule, however, the transit cannot occur on the exactbeat of the clock, but at the seventeenth second (for exam-ple) the star…
Astronomy
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