Excerpt from Nature, Vol. 72: A Weekly Illustrated Journal of Science; May to October, 1905 Germany, Physical Laboratories in, Prof. G. W. Kiichler's Report to director-general of Education in India, 605 Gernez Light Emitted by Crystals of Arsenious Anhydride, 23; Triboluminescence of Potassium Sulphate. 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.