Excerpt from The Psychological Review, 1920, Vol. 27<br><br>In describing a general plan of investigating the chto matic sensitivity of the peripheral retina in an earlier paper (1) the following were mentioned as two of the problems which we wished to take up: (a) a point to point determination of comparative sensitivities to the different colors from the center to the periphery, and (b) an investigation of the limits of sensitivity. The former of these problems has been made the subject of a recent paper The latter will be treated of here.<br><br>About the Publisher<br><br>Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com<br><br>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.