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 385
larger focal image. Finally, in1871, Dr Draper completed the largest reflector, of28 inches diameter, yet constructed in America, which is now part ofthe equipment of Har-vard Observatory. Still another type ofreflector, revived oflate in Germany andby Dr Common in Eng-land, is known as the6… … A. C RANYARD (1845-1894) tably produced by tilting the speculum. Ranyarddevised a very ingenious type of mounting, completedby Professor Wadsworth and adaptable to any formof reflector, whereby the advantages of a stationaryeyepiece are assured, in all possible pointings of thetelescope. Next in…
Astronomy
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