A Familiar Introduction to Crystallography

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Excerpt from A Familiar Introduction to Crystallography: Including an Explanation of the Principle and Use of the Goniometer, With an Appendix, Containing the Mathematical Relations of Crystals, Rules for Drawing Their Figures, And an Alphabetical Arrangement of Minerals, Their Synonymes, and Primary Forms The immediate purpose of the science of Crystallography, regarded as a branch of Mineralogy, is to teach the methods of determining the species to which a mineral belongs, from the characters of its crystalline forms. But the science itself is also capable of being rendered more extensively useful. The crystalline forms of pharmaceutical preparations will furnish a certain test of the nature of the crystallised body, although it will not determine its absolute state of purity. In chemical analysis, the forms of crystals will frequently supersede a more rigorous examination of the crystallised matter, and commercial transactions in the more precious mineral productions may frequently be guided by the crystalline form, or by the character of the cleavage planes, of those bodies. It does not appear in the works hitherto published that the connection between the crystal and the mineral has been any where so systematically explained as to enable the mineralogical student readily to connect the one with the other. 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.