Excerpt from Relative Sensibility of the Average Eye to Light of Different Colors and Some Practical Applications to Radiation Problems Some of the disagreements in previous investigations seem to be due, in part, to uncertainties in the radiometric measurements. The present investigation, therefore, was undertaken in View of this Bureau's complete equipment for evaluating light stimuli radiometrically and in view of the large staff Of trained investi gators available for Cooperation in the work. This investigation is somewhat statistical, the aim being to obtain extensive data on the relative sensibility of the eye to light Of different colors, but a complete study Of color perception is not attempted. The method of comparing the light stimuli is photometric. The application of the results Obtained is photometric and radiometric; as, for example, in applying corrections to spectrophotometric measurements made on narrow spectral bands, in designing lenses, and in the determination of the factor for converting visual sen sation into luminous power, i. E., the mechanical equivalent of light. 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.