NEW BOOKS K . FAJANS,N. H. FURYAN, Neuere massanalytische Methoden. By E. BRENNECKE, 211 pp., with 15 diagrams. Stuttgart: Ferdinand AND R. LANO. 25 x 16 cm.; xi Enke, 1935. Price: unbound, 18.00 RM; bound, 19.80 RM. This work is divided into six sections: Section I, dealing principally with a standardized method of determining indicator corrections in acid-alkali titrations; Section 11, giving full details of the use of ceric sulfate in volumetric analysis; Section 111, describing titrations by means of standard iodate or bromate solutions, as developed chiefly by Andrews, Lang, Berg and Manchot and Oberhauser; Section IV, setting out the advantages of chromous salts as standard reducing agents, and giving full details of the necessary indicator electrode and of many useful applications; Section V, a discussion of the principles and uses of oxidation-reduction indicators; Section VI, a n account of the theory and practice of the use of adsorption indicators. The names of the collaborators are a sufficient guarantee that the treatment of the sections associated with their work is authoritative; and in the last section, particularly, much useful and, in some cases, hitherto unpublished information is discussed in a concise and clear manner. The references testify t o a careful search of the literature. The inclusion of an author from the U. S. A. may be partly responsible for an impartial treatment of the literature from that country, but British chemists, too, receive justice in this respect, although some of them suffer from incorrectly spelt names and one of them is given a wrong initial. Apart from this there are very few typographical errors, The work can confidently be recommended as being a comprehensive and careful survey of the vast mass of recent material which falls within its purview. I t s price, however, a s with so many new German books, is high even in terms of currencies on a gold standard, and is almost prohibitive in terms of depreciated pounds and dollars. This is unfortunate, for the book merits a wide circulation, particularly because i t shows that there is a fruitful field in which analysts and physical chemists can cooperate with mutual advantage. A. D. MITCHELL.
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Ginelins Handbuch der anorganischen Chemie. 8 Auflage. Herausgegeben von der Deutschen Chemischen Gesellschaft. 26 x 17 cm. Berlin: Verlag Chemie, 1934. (1) System Nummer 35: Aluminium. Teil B, Lieferung 2; pp. xvi 309-13. Price: 49 RM. (2) System Nummer 4: Stickstoff. Lieferung 1; pp. v 292. Price: 43 RM. Subscription price: 38 RM. (1) The section on aluminium deals with the silicates and double silicates, and contains a long and interesting section on ultramarine, in which the recent literature is very fully covered. The alums and the aluminates are also included. The text is fully illustrated by phase rule diagrams and the results of physical and physicochemical methods are considered in detail. This section of the work is of special interest from the point of view of physical chemistry and constitutes a n invaluable source of information on many subjects of considerable technical interest. (2) The volume on nitrogen deals with the general chemistry of the element, including natural ammonia fixation and nitrification, with the physical and physico915
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