Excerpt from On the Copper Rich Kalchoids: Submitted in Partial Fulfillment of the Requirements of the Degree of Doctor of Philosophy in the Faculty of Pure Science, Columbia University Then two other works appeared, both bringing additional evidence to support Shepherd in his diagram. Bengough and Hudson4) in their experiments on the heat treatment of Muntz metal and Tafe15) in his determination of the copper-zinc diagram, advanced microscopical and thermal evidence indicating that roberts-austen's line e'-c - e was an error. 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.