Collier's New Encyclopedia

A complete general encyclopedia of 1921 — the world as it was understood just after the Great War, from Aachen to Zwingli, across twelve volumes and six thousand pages.

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Color Photography

a system of photographic reproduction of objects in their own colors, which should not be successful accomplishment of this has long been desired, and has been the subject of much research and investigation, but even to-day it is generally felt that the best solution has not been found. photographic apparatus and camera has had a staff of scientists at work on this problem for years, and has had several tory, there has been no introduction of a popular system of color photography.

Early experimenters, such as Edmond tory, there has been no introduction of a popular system of color photography. prints in which colors other than the customary gray or brown appeared.

Modern investigation is alo general lines, one the principles of prints in which colors other than the customary gray or brown appeared. Modern investigation is along two general lines, one the principles of which ference in wave number of the different colors. along two of which The other system is founded upon the work of Dr. J. Clark Maxwell, of Cambridge, who proved that, by the proper adjustment of red, green, and blue, any colors. work of Dr. J. Clark Maxwell, of Cam- The other system is founded upon the produced.

In 1915 Frederick E. Ives bridge, who proved that, by the proper adjustment of red, green, and blue, any directly from the negatives upon the print paper, which was a marked improduced. era with plates sensitized to red, green, and blue. After exposure the three plates are developed in a tank, and the print from the blue plate is made upon specially prepared paper, while the prints of the red and green negatives are made upon transparent films, which properly located. From this combined film, any number of prints may be made. are then laid over the blue print and properly located. From this combined film, any number of prints may be made.

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