Cet ouvrage est un guide pratique pour l'essai des mines et des métaux, destiné à ceux qui travaillent dans l'industrie minière et métallurgique. Il couvre les principes de base de l'essai, les méthodes et les instruments utilisés, ainsi que les techniques avancées pour l'identification de métaux et de minéraux spécifiques. Un livre de référence pour tous les professionnels de l'exploration et de la production minières. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.