Download or read book The Journal of Comparative Neurology and Psychology, 1909, Vol. 19 (Classic Reprint) written by Henry H. Donaldson and published by Forgotten Books. This book was released on 2016-12-09 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Journal of Comparative Neurology and Psychology, 1909, Vol. 19 Believing that many problems in the study of color vision in animals cannot be solved without the aid of a continuous spectrum, and being more or less disheartened by the failure of colored papers and filters (as they have heretofore been used) to furnish suitable stimuli for testing even the more elementary questions at issue, the writer began work upon a spectral light apparatus which it is hoped will make possible an experimental treatment of the following problems. 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.