Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt and Company · leaf 300
tive plate have less relative im-portance. THE SUNS PHOTOSPHERE. 281 Again, M. Janssen has noted tlwit in short exposures the photo-graphic spectrum is almost monochromatic. In this way it differs greatly from the visible spectrum, and tothe advantage of the former for this special purpose. The… … FlG. 77.—RETICULATED ARRANGEMENT OF THE PHOTOSPHERE, grams is less than 00005. The development of such pictures isvery slow. These photograms, on examination, show that the solar surface iscovered with a fine granulation. The forms and the dimensions ofthe elementary surfaces are very various. They…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
