Excerpt from Selective Radiation From Various Substances, III The fewness of the reflecting surfaces reduced the energy losses by reflection. It will be noticed presently that the scattered light in the system is very uniformly distributed over the field. Hence while not negligible in the case of an intense source of radiation such as the Nernst glower, this diffuse light simply increases the observed radiation by a fixed amount throughout the entire spectrum. Of course, for a small angular distance from the normal, as obtains in the present experiments, the scattered radiation should be uni formly distributed, but heretofore no very definite experiments have been published to give the desired information. From the Observations of Rosenmuller 1 it appears that the actual loss of light in such an instrument is insignificant out into the extreme violet. For radiometric work this correction would have but little Significance and in the present work no correction has been applied. 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.