frequently accompanied by a discussion of possible difficulties. On the whole, the book is excellent and should serve students of clualitative analysis well-much better than many of the older books now available. J. WOOD LYMAN ST. LOWS IrNrvrrnsrrv
ST. I.o~r~s. Mrssovnt
Volumetric Analysis. Volume I. Theoretical Principles. I. M. KoLTHoaF, Ph.D., Professor of Analytical Chemistry of the University of Minnesota, in collaboration with Dr. I n g H. Menzel, Dresden, Germany. Translation by N. HOWELLFURMAN, Ph D., Associate Professor of Analytical Chemistry, Princeton University. First edition. John Wiley and Sons, Inc., New York City, 289 pp. Figures 20. 1928. xvii 15 X 23 cm. $3.00.
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There has been a definite need for a book giving a modern treatment of the theory of volumetric analysis and Dr. Kolthoff has made a laudable contribution to this subject. The author realizes the difficulty of trying t o bring together diverse analytical processes under one theory and remarks in italics, on page 115, yet one should never fail to test the theoretical drdduclions experimentallv, and should not be content marely with tire result of the romputation. It is in this spirit that the author develops the theory. The first three chapters deal with the principles af neutralization, precipitation, complex formation, and oxidation-reduction reactions. As is t o be expected, the development is mare mathematical and mare detailed than that given in the usual laboratory text. Numerous titration graphs are also given. The next two chapters deal with indicators and titration error. Two chapters, showing the relations of speed of reaction, catalysis, ind u e d reactions, absorption and related phenomena t o some volumetric processes. present much material not found in the A conventional "quantitative" text. chapter on volumetric organic methods
gives a summary of some organic titrations. Two chapters dealing with the stability of solutions and the determination of equivalence-point complete the book. Of the various tables in the Appendix, Table 111, giving the solubility product of about seventy salts, deserves especial mention. As a text the book might prove a hit difficult for second-year chemistry students meeting volumetric analysis for thr first time. It will prove of value t o students who have a knowledge of inorganic and elementary physical chemistry. The book should be a source of inspiration t o research workers and teachers, for Dr. Kalthoff clearly points out the limitations of the theories and data and shows the directions subsequent researches must take. The hook is well set up and is remarkably free from errors. Line 22, page 83, which should read, "The iodine solution is oxidized to iodine-," was the only one noted. The majority of the references is to the German literature, but this is the sole evidence one has that one is reading a translation. No higher tribute can be paid Dr. Furman.
Organic Laboratory Methods. LASSARCOHN,translated by RALPHE. O E S P ~ , Associate Professor of Analytical Chemistry, University of Cincinnati. Edited by ROGERADAMS,Director of Cbemistry Laboratory, University of Illinois. The Williams and Wilkins Ca., Balti469 pp. 180 more, Md., 1928. xi figures. $6.50.
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This book is number two of The World Wide Chemical Series, edited by E. Emmet Reid. The fifth edition of LassarCohn's work appeared in the original German in two volumes and was published in 1922. Oesper has translated the first of the two volumes which deals with the general operations of laboratory technic. The book should be welcomed by
