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On a Method of Separating the Mineral Components of a Rock

Nature volume 49, pages 211212 | Download Citation



IT is told of a famous German petrographer, that whenever appealed to by a student in difficulties over a problematical mineral in a rock-slice, his invariable advice was “Get it out.” It is hard dispassionately to reflect on the sufferings to which this simple process of “getting it out” have given rise. All we petrographers have passed through the vale ! May we now indulge the pious hope that the following simple apparatus may bring some mitigation to the ordeal? It will certainly save a good deal of time and trouble when only small quantities of a particular mineral are required; enough, that is, for a blowpipe analysis, a flame test, and microscopical examination.

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