Excerpt from Metallurgical and Chemical Engineering, Vol. 17: A Semi-Monthly Technical Newspaper, Being the Incorporation of Electrochemical and Metallurgical Industry, and Iron and Steel Magazine; From July 1 to December 15, 1917 Granular carbon was obtained from the National Carbon Company, the size of grain being about 20 mesh, and was filled in to the top of the refractory ring. 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.