Book Description

Excerpt from Manual of Metallurgy: Or, a Practical Treatise on the Chemistry of the Metals The methods of extracting the metals from their ores are so extremely varied that it would be impossible to comprise them all within the limits of a single volume; the more important processes have therefore been selected. In describing these, the necessary facts have been presented to the student in the order in which a knowledge of them is required; the crude ores being traced from the mines in which they occur through the various mechanical and metallurgic elaborations which they subsequently undergo before the metal is obtained. The student of metallurgy should be enabled to distinguish, by their crystallographic as well as by their chemical characters, all the more frequently occurring ores, and be familiarly acquainted with the composition and properties of the various fuels employed in furnace operations. With a view to facilitate the acquirement of this knowledge, a short chapter on crystallography has been introduced, whilst another has been devoted to natural and artificial fuels. The information which has been given on the important subject of Assaying will, it is hoped, sufficiently supply a want which has been long felt in this country. In the preparation of this volume, the works of Dufrenoy, Regnault, Berthier, Knapp, Scheerer, Le Play, Rammelsberg, Lampadius, Dana, Karsten, and Aileron de Vieillefosse, have been consulted. Other authors whose works have been used will be found specially mentioned in the text. As a former pupil of the first-named mineralogist, I have employed in a condensed form the system of crystallography adopted in his valuable work on that subject, from which have been taken the greater portion of the diagrams relating to the laws of crystallization. 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.