New Books
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raphy; properties of minerals; water analysis; fuels and illuminants; analysis of silicates; acid and alkali manufacture; oils and fats; paints and pigments; agricultural chemistry; carbohydrates; beer and spirits; tannin materials; fibers; coal tar products; physiological chemistry; india rubber; tobacco; photography. The pages on electrochemical analysis and on photography show how much can be presented in a small space. Since tannin is miscible practically in all proportions with water, it should a t least be called very soluble, p. 354. If cobaltous compounds are to be listed as cobalt compounds, p. 162, they should be put before cobaltic compounds. The editor has certainly got together a marvellous amount of information and the fact that the book has been revised every year seems to show that there is a distinct demand for it. Wilder D. Bancroft
Chemical French. ‘ B y Maurice L. Dolt. Second edition.
22 X 15 cm; Easton: The Chemical Publishing Co., 1920. Price: $4.00.The first edition was reviewed in 1918(22, 460). The book has been so successful that a new edition has now appeared. The author has corrected many of the errors in the first edition, which is an almost unprecedented thing for any author to do. I n the new edition there has been added a selection from Le Chatelier. The book was a good one originally and is better now. Wilder D . Bancroft
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ERRATA The following corrections are to be made: Page 225, line 2 1 , Fig. 4 instead of Fig. 2. Page 2 2 6 , line 8, Fig. 2 instead of Fig. 4. Page 2 2 9 , line 2 , 42 instead of 1/2. Page 2 7 0 , line 17, insert missing half of bracket. Page 414,Fig 8, delete ‘/ssize. The cut is approximately full size; but the exact dimensions may depend on the method or ori the observer’s methods and preferences.
