Excerpt from The Chemical News and Journal of Industrial Science, Vol. 122: With Which Is Incorporated the 'Chemical Gazette', A Journal of Theoretical and Practical Chemistry and Physics in Their Application to Engineering and Manufactures Coagulation of blood in abattoirs, deodorisation of putrid meat, waste fish, &c., require large quantities of ferric sulphate. Consequently it is useful to manufacture this material cheaply by the action of residual pyrites 011 cinders two substances of no appreciable value). 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.