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VERSUCH EINER ELEMENTAR-METHODE ZUR NATURHISTORISCHEN BESTIMMUNG UND ERKENNUNG DER FOSILIEN, Part 1 (Published 1812) by Carl Friedrich Mohs
Vienna: Gamesinaschen Buhhandlung, 1812
8vo, xxix + 128pp. + 1p. errata. Original hardcover binding, with black lettering on slip on spine. Text in German, and printed in the old Fraktur typeface. Please note that part 2 of this publication was never published.
Carl Friedrich Christian Mohs (1773 – 1839) was a German chemist and mineralogist. He was the creator of the Mohs scale of mineral hardness. Mohs also introduced a classification of the crystal forms in crystal systems independently of Christian Samuel Weiss.
The Mohs scale of mineral hardness (/mo?z/) is a qualitative ordinal scale, from 1 to 10, characterizing scratch resistance of minerals through the ability of harder material to scratch softer material. The scale was introduced in 1812 by the German geologist and mineralogist Friedrich Mohs, in his book "Versuch einer Elementar-Methode zur naturhistorischen Bestimmung und Erkennung der Fossilien"; it is one of several definitions of hardness in materials science, some of which are more quantitative.
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