Chemical Technology Or Chemistry In Its Applications To Arts And Manufactures Gas Lighting

Author : Charles Eward Groves
Publisher :
ISBN 13 : 9781332529155
Total Pages : 426 pages
Book Rating : 4.5/5 (291 download)

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Download or read book Chemical Technology, Vol. 2 written by Charles Eward Groves and published by . This book was released on 2015-08-09 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Chemical Technology, Vol. 2: Or Chemistry in Its Applications to Arts and Manufactures; Lighting This volume of Chemical Technology deals with the special application of Fuel to the purpose of producing Light, irrespective of the heat developed at the same time, and as there are many ways in which this is effected, it was necessary to fix on some order of sequence in which the various Sections should be arranged. Something in the nature of historical or chronological succession has been adopted as a matter of convenience, but this relates only to the order in which.the various methods of obtaining light came into use, for it is evident that as the means of illumination referred to, in their higher developments at all events, are every one of them still in use, there is no reason to suppose that no further improvements will be made or that they will any of them become obsolete. In the first Section, that on Oils and Fats, for which we are indebted to Mr. W. Y. Dent, only those which are used for lighting are considered, thus excluding the very large and important class of oils and fats employed for lubrication, or as vehicles in painting or varnish making, or as material for other chemical products. Although the general outline of the technology of these substances remains essentially the same as it was in early times, yet the great progress which has been made in recent years in the machinery used in their extraction and preparation will doubtless continue, resulting in saving both in cost and in labour, besides improving the purity of the product. Further important advances have been made in the matter of testing these materials, whereby not only can the quality of the product be ascertained, but the presence and nature of foreign substances can be detected, whether they occur as accidental impurities or have been added for the purpose of fraudulent adulteration. Owing to the highly complex nature of the compounds themselves, their very close resemblance one to another, and the ease with which they are decomposed by chemical agents, the tests applicable to them are more or less uncertain in their operation, much depending on an exact attainment of similar conditions and on the experience of the operator. Still, as shown in the section relating to this subject, much has been done to render these tests precise and comparable when made by different observers. In the Stearins Industry, described by Mr. J. McArthur, there is a somewhat similar condition of affairs, but the entire subject is comparatively modem, involving definite chemical processes. 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.