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 146
by no means so perfect apicture as photographs made in the usual way : but it issufficient to show how the prominences stand related to thesolar surface, and its comparison with an ordinary photo-graph brings out many interesting peculiarities. The newmethod is a great step in the study of solar…
Astronomy
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