AN ABRIDGED TREATISE ON THE DOCIMASTIC EXAMINATION OF ORES, AND FURNACE BY BRUNO KERL, PROFESSOR IN THE ROYAL SCHOOL OF MINES; MEMBER OF THE ROYAL TECHNICAL COMMISSION FOR THE INDUSTRIES, AND OF THE IMPERIAL PATENT OFFICE, BERLIN. TRANSLATED FROM THE GERMAN BY WILLIAM T. BRANNT, GRADUATE OF THE ROYAL AGRICULTURAL COLLEGE OF ELDENA, PRUSSIA. EDITED BY WILLIAM H. WAHL, PH.D., SECRETARY OF THE FRANKLIN INSTITUTE, PHILADELPHIA. ILLUSTRATED BY SIXTY-FIVE ENGRAVINGS. PHILADELPHIA: HENRY CAREY BAIRD & CO., LONDON: E. & F. N. SPON, 16 CHARING CROSS. 1883. 154982 JUN 19 21 MKT K45 A 6014139 PREFACE TO THE AMERICAN EDITION. In view of the well-known thoroughness and accuracy of Bruno Kerl's various metallurgical works, the preparation of the present edition of his abridged MANUAL OF ASSAYING has been undertaken with the conviction that it would be doing a real service to English speaking students and teachers of the subject. Though presented in very condensed form, every method of importance will be found to have received notice, and its practical value duly estimated at its proper worth. The utility of the translation it is hoped will be found to be increased by the introduction of the English equivalents of the French metric weights and measures, wherever these occur throughout the work. In other respects the aim of the translator and reviser has been to preserve in its integrity the text of the original work. W. H. W. PHILADELPHIA, April 5, 1883. |