ELEMENTARY PHYSICAL &EMISTRY. Merk Randall. Professor of Chemistry, University of California. Berkeley. California, and Leona Esther Y o w g , Professor of Chemistry, Mills College, Oakland, California. Randall and Sons, 2512 Etna Street. Berkeley. California, 1942. xiv f 455 pp. 279 figs. 15 X 23 cm. $4.50. The authors wrote this hook primarily for sophomore and

junior students and particularly for those not majoring in chem- istry. To arouse interest, applications are stressed in both illus- trations and problems. As a further stimulus, "The order of presentation is arranged to parallel the work . . . in . . . several courses beyond the first year." This results in an outline same- what as follows: Introduction. ~oo r i za t i on and activitv. auan- ~~ ~ ~~~ ~~ . . .. . titative analysis, fugacity and perfect solutions, general ionic equilihria, g a w , thermochemistry, liquid mixtures, colligativc properties, phase rule, free energy, electromotive force, volu- metric relations, solubility and activity, special ionic equilibria. viscosity, conductivity, polarization, kinetics and radioactivity. Moreover, the various subjects are so interwoven that selection of chapters alone will not suffice to fit the book to the more tradi- tional order. The hook is called "elementary" and in part it is. But the reader may question the justification for using this term when he considers the twelve pages spent on kinetic theory, six- teen more on the solubility of "insoluble" salts, and other things of like character.

In its parts the h w k is well written and interesting. Espe- cially well done are the sections on ionic equilibria, indicators and buffers, free energy and equilibrium, phase diagram inter- pretation. etc. As might he expected, the thermodynamic ap- proach is emphasized throughout. The solution of problems by the method of successive approximations is carefully demon- strated in several connections. There is an unusually extensive discussion of calorimetry. Six hundred and ninety-four prob- lems provide a most liberal collection. Each of the numerous figures is accompanied by an explanatory paragraph. There are abundant references and ample tables of data (96, including those in the prohlems and appendix). The hwk is a photolith reorduction. - - =~

This hook is recommended far reference purposes, for indi- vidual study, and as a text when the conditions of its use approxi- mate the authors' intentions.

MALCOLM M. H m o U m s s m OP M U Y L ~ D co,..srs P-. MAIIYL*ND

ANALYTICAL CHEMISTRY. VOLUME 11. QUANTITATIVE! ANALYSIS. Based on the text of F. P. Treadwell, revised and enlarged by William T. Hell. Massachusetts Institute of Technology. Ninth English Edition. John Wiley and Sons, Inc.. New York, 1942. xi + 808 pp. 121 figs. 15 X 23 (m. $6.00. Since 1904 when the first English edition of this text appeared.

the book has been a standard reference work far analytical meth- ods. During the last four decades there have been few students of quantitative analysis who did not seek and find valuable analytical methods in the Treadwell and Hall.

It is significant that there is a Ninth Edition to review and this, in itself, speaks for the value and importance of the book. This edition is certainly not a translation of the German text, and i t is more than a revision of the eighth English edition. Professor Hall has expanded many parts, introduced new methods, com- pletely rearranged the sequence of metallic elements, and yet, by elimination of some of the older material, has kept the size of the hook practically the same as in previous editions. This is in accord with the author's purpose to have i t "an inexpensive textbook, which is meant to be useful to students of chemistry who desire precise information concerning well-known analytical methods." As in previous editions the author has limited himself to the methods of Gravimetric, Volumetric (Titrimetric), and Gab Analysis. These constitute three of the four parts of the hook. The fourth part is composed of informational and useful data, as density tables of acid and base solutions, molecular and

values, and logarithm tables. The application of instrumental methods to analvsis is de6nitelv excluded from the scone of the . ~ ~.~~~ ~~-

hook, and micro and semimicro methods have not been included. A major change is the rcnrrangement of the cations according

to the usual scheme of qualitative analysis. As in previous edi- tions most of the analytical theory is relegated to "Volume I. Qualitative Analysis," but thc esscntinl theoretical material for acidimetry and alkalimetry is given and the Briinsted concept of Acid-Base is introduced. The theory relating to indicators, buffer solutions. and oxidation-reduction has been exnanded.

The section on weighing and manipulative tcrhnic is dehitely improved by the replacement of the Kohlrauxh mrthad of weight calibration by a trsnsposition method, by theelimination of some figures representing old type equipment, and by the introduction of a brief discussion of colloidal solutions and coprecipitatton.

This edition retains all the advnntages of the previous editions, and in addition has brought in same bewer analytical methods. The use of the term "polarity" (p. 449) affects this reviewer very much as the same usage affected the reviewer of Professor Hall's "Textbook of Quantitative Analysis."' Thereviewer regrets too that a considerable number of references are given without the year, thereby making it difficult for the reader to determine quickly the applicability of a given method to a present problem. The hook is an excellent reference text far advanced analytical students, teachers, and investigators. It also serves most ad- mirably as a reference bwk for beginning analytical students he- cause i t offers a wrietv of methods for a eiveu determination - ~ ~~~

and therefore gives definite training in choice of analysis. The details of procedure arc clear cut and accurate. The hook is well arranged, the type, paper, and binding ewellent. It will be wel- comed not only by those who have consistently used the pre- ceding editions but by the younger analysts who are beginning to realize that the choice in method of analysis depends not alone on the constituent saueht hut on manv other factors.

AN OUTLINE OF OROASIC NITROGEN COKPOUNDS. Ed. F. Dqtr- i n g . Purdue University; Cod Sordcnco. Alabama Polytechnic Institute; and G. H. Gym. Westvaco Chlorine Products Com- pany. Third ~dit ion. . John S. Swift. Inc., Cincinnati, Ohio, 1942. 381 pp. 15 X 23 cm. $6.00. This book represents in planographed form material accumu-

lated by the authors over a period of many years, and in part in- cluded in courses given a t Purdue University. I t fallows in general the type of "Outlines of organic chemistry" by Degering, Nelson and Harrod, and although written in outline form i t nevertheless contains enough discussion and explanation to permit of its use as a textbook. One may also add that it will make a very useful reference work of moderate size in this field.

The 6rst chapter, entitled "General Concepts," deals with questions concerning atomic structure, relative electronegativity, and the mechanism of reactions. There follow a few pages an the fixation of nitrogen and the ammonia system, and then an ex- tended treatment of the more important classes of open chain nitrogen compounds (242 pp.). Alkaloids are treated brietly (12 pages) and nitrogen ring compaunds somewhat more fully, though here only the methods of preparation are given. The book concludes with short sections on explosives and on the iso- merism of organic nitrogen compounds. The arrangement of a tVDical section (dinhatic amines) is the followine: A. The . . . . " geueral rclatmnship of the amincs nnd their natural occurrence; B. Somenclaturc; C. Preparation; D. Physical Yroperties: E. Reactions.

The printing, typography and binding are good, although the reviewer has noticed a few minor misprints. The price seems a trifle high for a planomphed book of this size.

equivalent weights, chemical factors based on 1941 atomic weight 1 HALL, J. CHBM. E ~ u c . , 19,350 (1942).