Stars and telescopes; a hand-book of popular astronomy, founded on the 9th ed. of Lynn's Celestial motions (1899)
Todd, David P. (David Peck), 1855-1939, Lynn, William Thynne, 1835-1911. Celestial motions · Boston, Little, Brown and company · leaf 429
iefdifficulty of construction, but this end is now attaineds & t — 24 37° Stars and Telescopes with all necessary precision by means of graduatingengines, similar to the one in the last illustration.Errors of a whole second of arc in the position of aline on the face of a silver circle are now… … zach (1754-1832) But few observers are able to assign the absolutetime when a star is actually crossing a line in the fieldof view: most will record the instant after the starcrosses, while a few will always set down the instantbefore that event. Any difference between the abso-lute and observed…
Astronomy
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