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First Principles of Chemistry (1860 & 1915)

First Principles of Chemistry
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During the five years -which have passed since the second edition of First Principles of Chemistry was prepared, intense activity has prevailed in all departments of chemical research. Any attempt to preserve the stereotype plates of that edition in the present was found to he quite impracticable.
The whole work has been entirely revised, rewritten, and so far rearranged, as experience has shown to he desirable. Some parts have been enlarged, and some have been contracted, so that on the whole the size of the volume remains much as before. A great number of new illustrations have been added, more than doubling the number in the former editions. A considerable number of wood cuts have been taken from Kegnault’s excellent Court de Chimie, and many new ones have been drawn from the author’s apparatus. Every important fact, formula, and number in the work has been carefully compared with the most recent and valued authorities. The changes made in the atomic weights of elementary  substances, during the last five years, have been numerous and important;
and in most cases these changes have added simplicity to the science. The new facts and principles gleaned in no inconsiderable numbers for this edition, have been woven into the text in suc’a a manner as to present, it is hoped, an uniformity of design.

In the Organic Chemistry, greater simplicity and unity has been giver. The principles involved in the almost unwieldy mass of facts which have accumulated so rapidly during the last ten years. The author has again to acknowledge his obligations to his friend and former associate, Mr. HUNT, for his lucid and original exposition of this part of the subject. The adoption of this work by many of the first seminaries of learning in this country, is a gratifying evidence to the author that his design
has been appreciated ; and he trusts that those who gave their confidence to the two first editions, will find the present one, in many important respects, superior to them.

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