Excerpt from Abstracts of Current Decisions on Mines and Mining: Reported From September to December, 1917 The patent issued to H. Greenway, June 9, 1914 (letters Patent No. Is valid. The process disclosed in this patent was a substantial departure from processes of the prior art. The heating of water is a matter of large moment and the use of acids is a matter of constant and considerable expense. By wholly dispensing with both by the use of a minute quantity of hydroxy compounds, the patentee has disclosed an original and novel plan which has broad ened and made more simple the agitation process of air flotation. The novelty and inventive character of Greenway's discovery is patentable. Miami Copper Co. Mineral Separation, 244 Federal, 752, p. 774. 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.