Excerpt from Annales des Mines, ou Recueil de Mémoires sur l'Exploitation des Mines Et sur les Sciences Et les Arts Qui S'y Rapportent, 1836, Vol. 10 La durée de l'opération dépend de la nature de la houille et surtout de l'état de l'atm03pbèoe. Le tas brûle d'abord à cheminées - maîtresses dé couvertes pendant un jour. Après qu'elles sont bouchées, la combustion continue par les ou vreaux horizontaux et par les cheminées ordi naires, terme moyen, pendant 3 à 4 jours; alors on recouvre le tas de! Cendres et on étoufi'e au moins pendant 3 jours, et mieux pendant 8 à ro jours si la fabrication n'est as pressée. La car bonisation dure donc de 7 a 1% jours.' 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.

Excerpt from Annales des Mines, ou Recueil de Mémoires sur l'Exploitation des Mines Et sur les Sciences Et les Arts Qui S'y Rapportent, 1836, Vol. 9 La baryte sulfatée est extrèmement rare, ainsi que le spath fluor. A ces gangues il faut s°outer le grunstein, dans lequel se trouvent les blons, et qui souvent est assez fortement imprégné de minerais pour ètre soumis avec avantage au travail du bocard. 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.

Excerpt from Annales des Mines ou Recueil de Mémoires sur l'Exploitation des Mines Et sur les Sciences Et Arts Qui S'y Rapportent, 1836, Vol. 10 La carbonisation se fait à Saint - Étienne et à Rive - de - Gier en pl ein air et dans des fours en em ployant exclusivement la houille menue. 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.

Excerpt from Annales des Mines, ou Recueil de Mémoires sur l'Exploitation des Mines Et sur les Sciences Et les Arts Qui S'y Rapportent, 1846, Vol. 9 Les premières (a) sont le plus souvent stériles très - faciles à se désagréger, et ne sont probablement que des débris d'un terrain primitif, ou, pour dire avec plus d'exactitude, d'un terrain antérieur à l'époque de ce mème terrain secondaire du groupe (i) dont la formation avait précédé le soulèvement des Andes. 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.

Excerpt from Annales des Mines, ou Recueil de Mémoires sur l'Exploitation des Mines Et sur les Sciences Et les Arts Qui S'y Rapportent, 1846, Vol. 10 Cependant les circonstances les plus impor tantes à considérer n'ont pas été examinées dans ces monographies. Ainsi la teneur en or des sables lavés n'est signalée nulle part; car le bénéfice moyen d'un orpailleur ne donne mème pas une idée grossière de cette richesse ni du degré de perfec tion da lavage. 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.

Excerpt from Annales des Mines, ou Recueil de Mémoires sur l'Exploitation des Mines, Et sur les Sciences Et les Arts Qui S'y Rapportent, 1853, Vol. 4 M. Een. Die Construction des com bles dans les conditions les plus diverses. Livraisons in-8. Th. Grieben à Berlin. 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.

Excerpt from Annales des Mines, ou Recueil de Memoires sur l'Exploitation des Mines Et sur les Sciences Et les Arts Qui S'y Rapportent, 1842, Vol. 1 L'administration a reserve un certain nombre d'exemplaires des Annales des Mines pour etre envoyes soit a titre de don aux principaux etablissements nationaux et etrangers, consacres aux sciences et a l'art des mines soit a titre d'echange aux re docteurs des ouvrages periodiques francais et. Etrangers, relatifs aux sciences et aux arts. Les lettres et documents concernant les Annales des Mines doivent etre adresses sans le couvert de M. Le sous - secretaire d' etat au ministere de: travaux publics a M. Le secretaire de la commmron des Annales des Mmes, Paris. 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.