Collins, A. Frederick (Archie Frederick), 1869- · New York, London, D. Appleton and company · leaf 207
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 is white,… … 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
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
