Excerpt from The Physical Review, January June, 1916, Vol. 7: A Journal of Experimental and Theoretical Physics; Series II The most striking result Of the experiment is the smallness Of the reflection observed - only 10 per cent. At volt velocity, increasing to 40 per cent. At 50 volts velocity. Interesting evidence is also Obtained regarding the cause of the spreading of a beam of slow-moving electrons, and the energy relations in the production Of delta rays. 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.