Museum, N: Annual Report, 1902 (Classic Reprint)

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Museum, N: Annual Report, 1902 (Classic Reprint)

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O knihe

Excerpt from Annual Report, 1902

Among the great number of crystallized mineral species there is no single mineral which presents such remarkable variety of crystallographic forms and combinations of forms, as calcite. When in addition to the fore going fact we consider the no less important one that no mineral is of such universal occurrence or is produced under such varying conditions, it would seem that here, if anywhere, lay the key to the great problem of the influence of genetic conditions upon the crystal habit of minerals. In the present monograph the writer has aimed to bring to the aid of the study of this problem, crystallographic notes on a number of calcite occurrences within the limits of New York State. Such a work must of necessity retain the incompleteness devolving upon the limitations of present knowledge as to undeveloped localities. It is, therefore, hoped that with progress in the exploration and study of new localities the present volume will be supple mented by further work on this very interesting mineral.

The writer has drawn freely upon his previously published notes both for descriptive matter in the text and for illustrations of the crystallographic combinations shown in the plates. Much of the previously described material has, however, been restudied and in most instances the figures redrawn.

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