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Although these are thoroughly treated in "Volumetric Analysis," by the same authors [for a review see J. CHEM.EDUC., 6, 504 (Mar., 1929)) in the end a self-contained book is preferable. Several new electrodes are described. such as the platinum and iodoso-benzene electrodes, etc. The subject of the glass electrode has been very considerably expanded. New and special designs of electrodes are also included. Especially noteworthy is the great increase in the number of vacuum tube circuit? that are described. The greatest increase in material is found in the section dealing with the potentiometric analyses themselves. Many analvses formerly incorporated in a single chapter have been expanded to whole chapters. A considerable number of new methods are found in the miscellaneous section. Very valuable new chapters are those dealing with the use of ceric sulfate. arsenious oxide and chromous chloride and sulfate. There are abundant references to the literature and an excellent set of useful tables in the appendix. A four-place logarithm table has also been added. The bibliozra~hv . . . has been expanded from sixteen t o thirty-five pages. In conclusion, the authors are t o be heartily congratulated on the way in which they have made available the material in this important field. No student of the subject or practical worker can afford to be without this guide. [Fora review of the first edition of this hook see J. CHEM.BDUC.,3, 846 (July, 1926).1 MALCOLM M. H.4RING
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City, 1931. ix 224 pp. 15 X 23 cm. $3.00.
34 Figs.
The preface states: "In attempting a revision i t has been our aim to preserve as far as possible the spirit of the original work. Few changes have been made except where i t war necessary to bring the terminology up to date. "The purpose of the book has always been to supply the needs of the undergraduate student rather than those of the routine analyst. For that reason considerable space has been given to the development of a setting for the various analytical tests so that the student will see them in their true perspective. "The present edition differs from the former principally in the addition of the newer analytical procedures. The methods for the determination of pH and free chlorine are notable examples. A more extensive discussion of losses due to hard water and detailed direction for the systematic analysis of boiler waters also have been included. A chapter of laboratory exercises in water treatment describes procedures whereby a student may actually carry 6ut the common processes of water treatment, such as softening, coagulation, and chlorination. The exercise on water softening is based upon a series of tests which were a part of the routine orocedure used by the Kennicott Water Softening Company to determine the cost of chemicals required for treatment. This group of exercises has been found especially useful in courses designed to instruct engineering students in the principles of water examination." The original text with the slight changes indicated makes up about half the book. Besides the additions noted above one appendix of 35 pages gives in full Reprint 1029 of the United States Public Health Examination of Water, Chemical and BacService on drinking water standards. Alteriological. WILLIAM P. MASON.Prof thouch this r e ~ r i n tis distributed free Emeritus of Chemistry, Rensselaer Public ~ k t Service, h its inclusion Polytechnic Institute. Sixth edition, by Profes- helm the other extensive additions to make revised by ARTHURM.BUSWELL. the bwk one of the largest collections of sor of Chemistry, University of Illinois information relating t o the examination Chief, Illinois State Water Survey of water and interpretation of the results. John Wiley & Sons. Inc., New York ~
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the
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JOURNAL OF CHEMICAL EDUCATION
I n the hands of a teacher as able as either of the authors this book can safely be used as a test for undergraduates. The average good student will understand that directions (page 108) to obtain grains per gallon by multiplying "diagrams" by 2 refen t o milligrams. He may be pleased or puzzled by being offered a choice between potassium "dichromate" on page 95 and "bichromate" in the footnote an page 97; also between "potassium thiocyanate" on page 111 and "potassium sulphocyanide" on page 175. I t will probably he desirable for a teacher to give the students some advice on the relative usefulness of the different methods for estimating some of the constituents for which methods are given in four different places. The occasional student who has some curiosity as to when certain things were done may have an interesting time completing the footnote references, which are largely incomplete either as regards dates or page numbers, and in the case of books, the names of publishers. The astonishingly incomplete and inaccurate index refers to R. H. Phelps as cited on page 1011: This probably means the reference to the fact that the orthotolidine test for residual chlorine was first proposed by Earle B. Phelps in 1909. The commonly used "B & B" soap solution described by Boutron and Boudet in 1855is credited on page 109 to Boutron and Boudet. The footnote gives the date as 1844. "Boutron" appears twice in the index. The 17 pages on the bacteriological examination of water have been revised to correspond with the current Standard Methods published by the American Public Health Association. I t is understood that the publishers have issued a correction sheet for six minor errors in the first printing. If they will correct ten or twelve more, of which some are noted above, will have the footnotes put into some standard form, perhaps have a little editing for uniformity of usage, and have an index prepared that will be moderately correct and complete, the booL can be recommended for use by
FEBRUARY, 1932
teachers of only average special experience in water analysis. W. D. COLLINS
Quantitative analytische Mihomethoden der organisehen Chemie in vergleichender Darstellung. C. WEVGAND,University of Leipzig. Akademische V& lagsgesellschaft M. B. H., Leipzig. 279 pp. 79 Figs. 15.5 X 1931. xi 23 cm. M. 18.
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Professor Weygand's book is a comparative presentation of the various quantitative analytical micro-methods of organic chemistry critically discussed in the light of the author's eight years of experience in teaching micro-methods. Consequently, the book is not a duplication of Pregl's well-known "Quantitative Organic Microanalysis" [for a review see J. C ~ M . Eouc., 7, 2755 (Nov.. 1930)I, hut a work which will serve to supplement the Pregl tent. The plan of the book is as follows: The method recommended by Pregl for earnin2 out a given determination is first described, and then follow various modified micro-pr-dures for accomplishing the same result. Finally the similar semi-micro-methodis described. Throughout the book a critical tone is maintained, and the advantages and disadvantages of the various procedures are discussed. Many determinations not mentioned in Pregl's work are included. Among these are the Zerewittinoff method for determining hydroxyl groups, the determination of primary aliphatic amines according e . the Barger method of to ~ k ~ l y k and determining molecular weights as modified by Rast. The text is copiously provided with references; work which-has appeared as late as 1931 is quoted. Illustrations are frequent; there are to be found not only line drawings of apparatus, hut photographs of several important manipulations. Those phatographs which illustrate the cleaning of
