A Practical Treatise

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Excerpt from A Practical Treatise: On the Manufacture and Distribution of Coal-GasI have endeavoured in the present Edition to lay before my'readers the various improvements that have been made in the Manufacture of Gas since 1841, and I have to acknowledge the valuable assistance I have received from my friend Dr. Frankland, who has revised the chapter on the Chemistry of Coal Gas. To Dr. Lyon Playfair I am indebted for much important information, and Mr. William Pole has enabled me to perfect the subject of the Distribution of Gas through Mains, the chapter upon the theory of the motion of elastic ¿uids through pipes being entirely from his pen. It will be perceived that I have retained in this Edition descriptions of many portions of apparatus that have ceased to be em ployed: and I have done so simply that their history may be preserved, since it is often as useful to know what machinery is defective, as to be acquainted with that which is more perfect. The analysis of the various kinds of coal found in different parts of the world cannot, I think, fail to be of value. I have been careful, throughout the work, to enlarge only upon those points on which experience has enabled me to speak with certainty.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.