Abstract
THE necessity of supplementing the microscopical examination of rocks and minerals by chemical tests led Dr. Boricky in 1877 to devise his method of micro-chemical analysis. He decomposed extremely minute particles of the substance to be examined on a glass slide, protected by a coating of Canada balsam, and examined the fluosilicates formed by the aid of the microscope. Since his time Prof. Streng, Dr. Haushofer, the author of the present manual, and others have devoted themselves to improving and extending micro-chemical methods. Although originally introduced for the purpose of enabling chemical tests to be applied to extremely small particles, it has been found that these methods have another and perhaps equally important claim to recognition. They often shorten the time required for a qualitative chemical examination. Thus Prof. Behrens tells us that a solution containing calcium, magnesium, zinc, manganese, cobalt, and nickel has been examined in forty minutes; and one containing silver, mercury, lead, bismuth, tin, antimony, and arsenic in an hour.
A Manual of Micro-chemical Analysis.
By Prof. H. Behrens. With an introductory chapter by Prof. John W. Judd. (London: Macmillan and Co., 1894.)
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Micro-Chemistry. Nature 50, 122–123 (1894). https://doi.org/10.1038/050122a0
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DOI: https://doi.org/10.1038/050122a0
