Excerpt from A Practical Treatise on the Gases Met With in Coal Mines and the General Principles of Ventilation The following remarks were written in the hope that some or other of them might prove of service in conveying to the merely practical miner a general knowledge of the laws and principles of ventilation, as applied to mines, and of the nature and properties, 'chemical and physical, of our atmosphere, as well as those of some of the gases most frequently encountered in coal mines. They were not intended to have been communicated to this or any similar institution, or thcy would, in all probability, not only have been put into somewhat different language, but would also have placed some of the matters to which they refer in a more purely scientific point of view. But, after all, such an alteration would, perhaps, have rendered them less useful than it is hoped they may prove to the particular class of persons for whom they were written, such as underviewers, overmen, deputy-overmen, and even workmen who may wish to fit themselves for assuming any of these offices; and, at the request of my colleague, your present President, I venture to submit them to your notice. 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.