Crystallography

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Excerpt from Crystallography: A Treatise on the Morphology of CrystalsI trust that, while endeavouring to fulfil the requirements of readers of the former kind, this book will not be found lacking in demonstrations that may satisfy those of the latter class, for whom indeed it may be said to commence at Article 53, p. 65. Several chapters, those for instance on Symmetry, are written with more detail than a geo metrical student might recognise as needed, but this seemed unavoidable if the usefulness of the book was not to be confined to such readers.Among my old students there have been some who have taken a great interest in the subject and in my book to their relations towards it and towards myself I may only advert here in a few too inadequate words. To a remoter time belongs Professor Lewis, formerly my colleague at the British Museum, and now Professor Miller's successor in the Mineralogical Chair at Cambridge.More especially are my cordial thanks due to the friend who succeeded me in the Keepership of the Mineral Department of the British Museum, Mr. L. Fletcher, for numerous and valuable suggestions and additions to the original ms. And to the proofs which he has so carefully revised.To Mr. Miers' skilful hand I am indebted for numerous figures, the drawing of which I found, with failing eyesight, to be increasingly difficult.nfa 52.Various features that I have adopted from the remark able Treatise (1866) of my Old friend Viktor von Lang, formerly, for a time, my colleague at the British Museum, justify my numbering the distinguished Vienna Professor among those to whom I am as much indebted for the matter of my book as I am for their sustained friendship.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.