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 379
roduced by tilting the speculum. Raxyarddevised 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 order we outline the development… … A. C RANYARD (1S45-1S94) Telescopes and Houses for Them 327 image, Euler (page 96) doubted the accuracy ofthis conclusion, and suggested that a combination oflenses of glass and water, of suitable curvatures, mightproduce a composite lens practically free from defectsof color — that is, an…
Astronomy
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