Abstract
MITCHELL's “Assaying ” is so well known to all whom the subject concerns, that it is hardly necessary at present to do more than announce the appearance of a new edition. In this edition, as Mr. Crookes explains, much new matter has been introduced, and matter which had become obsolete has been omitted. Among the more important of the additions are descriptions of the “automatic sampling-machine,” invented by Mr. D. W. Brunton; many new gas-furnaces and burners for the laboratory, devised by Mr. Fletcher, Messrs. J. J. Griffin, and others; new blow-pipe reagents and operations; new processes, dosimetric, volumetric, and calorimetric, for the partial and complete assay of iron ores, iron, steel, spiegeleisen, &c. In the copper assay the American system of fire assay is here, for the first time in this country, fully described. In the assay of silver, the action of bismuth on the ductility of this metal has received adequate attention. Much has been added about gold ores; and improved modes of assaying the precious metal and detecting it in poor ores are given. The number of woodcuts has been increased from 188 in the last edition to 201 in the present edition.
A Manual of Practical Assaying.
John Mitchell William Crookes F.R.S., Sixth Edition. (London: Longmans, Green, and Co., 1888.)
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Our Book Shelf . Nature 38, 148 (1888). https://doi.org/10.1038/038148a0
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DOI: https://doi.org/10.1038/038148a0