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 358
the black ground of the sky.Analogy led many to suppose that the nebulae or records its own spectrum, sometimes many hundred on a singleplate. The advantages of this fortunate arrangement are■obvious: peculiarities of spectra are continually leading to thedetection of variable stars that would… … THE BACHE TELESCOPE AT CAMBRIDGE(Aperture, 8 inches. Employed since 1885 in photographingthe stars and their spectra. Now mounted at A requipa,Peru, and in use upon the southern stars. The successof this photographic instrument led to the construction 0/the Bruce telescope, page 264)
Astronomy
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