Excerpt from Transactions of the Illuminating Engineering Society, Vol. 13: January December, 1918; Part I Society Affairs, Contents; Part II Papers and Discussions, Contents, Subject Index, Index to Authors Foreword - The various topics and sub-topics are listed alphabetically. It is suggested that related or functional topics should be reviewed when one desires all references on a given subject. The issue number (1 to 9) of the transactions precedes the page number. 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.