Lessons in astronomy including uranography. A brief intoductory course without mathematics (1896)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston, London, Ginn and company · leaf 298
htare very interesting objects. 378. Drawings and Photographs of Nebulae. — Until verylately the correct representation of a nebula was an extremelydifficult task. More or less elaborate engravings exist of per-haps fifty of the more conspicuous of them, but photographyhas now taken possession of… … Fig. 80. — The Annular Nebula in Lyra. 286 PHOTOGRAPHS OF NEBUL K. [I count.rv, and at present the photographs are continuallybringing out new and before unsuspected features. Fig. 81,
Astronomy
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