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Excerpt from Elements of Chemistry, Including the Recent Discoveries and Doctrines of the Science In labouring to correct the numerous typographical errors of the London work, the editors have been greatly assisted by the American reprints of the former edition of Turner's Elements, the great accuracy of which reflects so much credit on the industry and attainments of their accomplished editor. In spite of the care that has been used, many errors have no doubt escaped detection, some of which have been discovered in time to be included in the list of errata. For others which it is feared the reader will detect, the editors must claim his indulgence on the plea of the very short time allowed them for the performance of their task. 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 Elements of Chemistry, Including the Recent Discoveries and Doctrines of the Science In preparing a fifth edition of these Elements, I have not lost sight of the plan on which the work was originally framed. Its object is still, without entering minutely into the details of processes and experiments, to present a concise and connected view of the facts and theories of Chemistry. It has been found impossible, so numerous are the cultivators of this science, and so rapid its progress, to avoid numerous changes and additions. These have necessarily been interwoven with the texture of the volume, and it would be useless, were it practicable, to enter into an exact enumeration of them; but it may be convenient to some readers that the more important variations from former editions should be specified. In the first section there are but few changes, and those relate chiefly to Radiant Heat. In that on Light, a summary of the laws of reflection and refraction, agreeably to the wishes of some of my pupils, has been supplied. The article on Electricity has been almost entirely recomposed; and, owing to the kindness of Mr. Snow Harris, I have been enabled to embody many results of his late researches, prior to their appearance in a printed form before the public. I have to acknowledge a similar kindness in Mr. Faraday, whose discoveries in Galvanism have compelled me to remodel the whole of the fourth section. To procure all the facts required for that purpose, I have been obliged to delay writing the section on Galvanism until the other parts of the volume were completed. This will account for the labours of Mr. Faraday not being referred to in other portions of the volume, which, though placed after the fourth section, were, in fact, printed some weeks earlier. A few changes have been made in the section on the Laws of Combination, where will also be found a description of the mode of employing symbols in Chemistry. I ventured in the last edition to introduce chemical symbols as an organ of instruction, and subsequent experience has afforded such convincing evidence of their value in this point of view, that I cannot too earnestly urge the chemical student to employ them at an early period of his studies. The present state of Chemistry renders the use of abbreviated or symbolic language almost unavoidable; and the question now is, not so much whether they shall be used, as whether they shall be generally understood. To ensure this, it is essential that a uniform system be adopted; and I have hence felt the necessity of strictly conforming to the method introduced by Berzelius and adopted on the Continent. 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.