Stars and telescopes; a hand-book of popular astronomy founded on the 9th ed. of Lynn's Celestial motions (1901)
Todd, David P. (David Peck), 1855-1939, Lynn, William Thynne, 1835-1911 · Boston, Little, Brown · leaf 423
fdifficulty of construction, but this end is now attained s & t — 24 3 jo 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…
Astronomy
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
