Excerpt from The Philosophy of Color When a ray Of sunshine passes through a glass prism it is decomposed or separated, and if the prismatic colors are received upon a white screen, you will there find a pure blue, a pure red, and a pure yellow. These are colors of the spectrum, and known as the primary colors; and it is necessary, when speaking of any color, to bear these colors of the spectrum in mind as standards - a blue, for instance, that is the blue Of the spectrum. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.