The book of stars; being a simple explanation of the stars and their uses to boy life, written to conform to the tests of the Boy scouts (1915)
Collins, A. Frederick (Archie Frederick), 1869- · New York, D. Appleton and company · leaf 205
the glass plate, or celluloid film, looksall samee like a Chinese chromo, for the light and dark parts 185 186 THE BOOK OF THE STARS are just the reverse of that of the object which was photo-graphed ; in other words, where the picture should be white, it isblack, and where it should be black, it… … Fig. 180.—Camera Pointing to North Star. tive and held close to it in a printing frame when it is exposedto the light of the Sun. When the paper is printed dark enough by the Sun, it istoned to give it a pleasing color and fixed to make it last along time, and when washed and dried the image of the…
Astronomy · Stars
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