Abstract
THIS work is not only of importance in itself, but also derives considerable interest from the fact that it embodies the continuation, by a distinguished son, of work commenced by a distinguished father, for Henry Potonié's work on the structure of coal may be regarded in many respects as a classic. The author describes the object of the work by quoting a definition of Weinschenk to the effect that petrography considers the origin, the characteristics, and the mode of decomposition of rocks, and notes that, from this point of view, but little attention has been paid to the study of coal, so that the petrography of coal is still in its infancy. He further quotes a sentence from Dannenberg to the effect that, for practical purposes, distinctions drawn from a mineralogical or petrological point of view are of but little importance, but he shows that this state ment is only true because so little has been done towards the scientific study of the subject of the present book.
Einführung in die allgemeine Kohlenpetrographie.
Von Dr. Robert Potonié. Pp. x+285. (Berlin: Gebrüder Borntraeger, 1924.) 13s. 2d.
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Einführung in die allgemeine Kohlenpetrographie . Nature 116, 239 (1925). https://doi.org/10.1038/116239b0
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DOI: https://doi.org/10.1038/116239b0