König, E. (Ernst), 1869-1924, author · London : Dawbarn & Ward, Ltd., publisher of "Utility" books, 6 Farrindon Avenue, E.C. · leaf 87
otography The finished transparencies should be marked with the letters B., Y., R. (blue, yellow, red), so as to distinguish them. The Observing Apparatus The three constituent images can, as has been already pointed out, be projected by means of a triple lantern, or be combined into one colored… … Fig. 3. Section of Chromoscope. a rather high price. We will therefore accurately describe the construction of such an apparatus, so that everyone with a few tools may be able to make one, and one that will be as efficient as a bought one. The principle of the chromoscope can be most easily ex-…
Color photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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