George G. Brown and Associates, University of Michigan. Manuel Marin & Cia, Barcelona, 1955. xi + 629 pp. 551 figs. 64 tables. 22 X 2 8 cm. $14.

Yo v ~ o al joven. El joven es un estudiante. El est i estudi- a d o ingmi& q ~ ~ i m i r s . lil c a r p un l i lm paudr lhap ru bmro. ;Que es el lilro? I:* la traduwtrjn al e ~ p ~ i w l d r 'Vnit O p w - r i o d oor ( i . (;. Bnwn v d e e w de IH Unirrr.;idad tlr \ I i r l h n . " -

"Unit Operations" is well known and widely used in the Eng- lishspeaking countries and also in other countries where students secure a good working knowledge of English. This translation into Spmish was made by eight professors in various universities in Spain. Not only was the text translated, but all illustrations, charts, tabulated data, and problems were changed into Spanish legends and metric units. Errors in the earlier English edition were corrected.

The availability of "Operaciones BQsicas"will do much to stimu- late instruction in chemical engineering in the Spanish-speaking countries if proper texts and instruction ran be given in the basic subjects of material and energy balance.

KENNETH A. KOBE UNIVGRBITT OF T O X ~

A ~ ~ T I N . Ts**s

0 PHYSICAL CHEMISTRY

Farrington Daniels, Rofessor of Chemistry, and Robert A. Alberty, Associate Professor of Chemistry, University of Wis- consin. John Wiley & Sons. Inc., New York, 1955. viii + 671 pp. Many figs. and tables. 16 X 24 om. $6.50.

IN A certain Seme this text originated in 1913, and it is to be expected that it will be considered simply as the most recent re- vision in the series by Getman, Daniels, and now, Alberty. But this text is more than a revision; as before, we note evidence of careful attention to detail, logical order, and a. deep interest in the subject. Here the similarity ends. It is no more correct to consider this text a revision of the 1948 edition by Dr. Daniels than to consider that the works of Aquinas are merely 8 revision of thoee of St. Augustine.

I t is not feasible to cite a complete list of all the changes in the text; B definitive catalogue would defeat the purposes of a review. But we o m most easily understand why this is more than a revision by comparison with the 1948 text.

The order of presentation will be familiar to old friends of the series; there are no significant modifications. The gas laws are introduced in the 6rst few pages and the student is then care- fully led to an understanding of A F = AFo + RT In &. The remaining chapters, one-half of the text, apply this equation to practical and theoretical oases and discuss the specid branches: Conductance, Ianio Equlibrium, Colloids, Quantum Theory, Nuclear Chemistry, snd, of course, Kinetics and Photochemistry. The appendix is considerably smaller; some of the material has been incorporated into the text, and information of lesser importance disoerded.

The chapter on Atomic and Molecular Forces has disappeared and the material has been incorporated, in briefer form, here and there in the text. A few other sections have been transposed. For example, did-gaaeous eqnlibria have been moved to their

earlier position-in the same chapter with the phase rule. Some chapter titlrs have been changed to indicate their contents more accwately.

Throughout the text there are many detailed changes, this is the outstanding feature. Almost every paragraph retained from the 1948 text has been revised. Many new paragraph have been substituted and others have been added. I n each instance, the matter discussed is clearer than before. This is indeed a text written for the student. T o site four examples from many: Miller indices are no longer an enigma; the student should have no trouble in understanding why salt lowers the freezing point of water; Morse curves are used to help the student understand photoexcit&on; here and there a few exercises in the deriva- tion of relations are interspersed.

New and better illustrations have been prepared; only s. few old ones remain. The tables and many of the g r a p h are now easier to read. The interesting historical allusions have been retained. Several recent references to THIS JOURNAL and to others have been added.

The material is up to date; in so far as they are appropriate to an elementary treatment, the advances of the past seven years have been included. A few of these are: the determination of molecular weight by the scattering of light, microwave spee- troscopy, the kinetics of enzyme catalysis, a (far too brief) discussion of radiation chemistry, and C" dating.

Many of the problems are new, and as before, they are arranged in graded sets with answers supplied for the first set only. Al- though only actusl use will tell, i t seems possible that the students will be less successful than before in their attempts to solve the ~ ~ ~ . ( h l r r n s hy comparing tl!eni with exnmple i n thr tmt nnd ! ip- I,IJ '~IIK the example to the pro1,lern without T110119111.

Tla! new sketches, in n psucdo t l ~ r e t - d i ~ o ~ r ~ r i u ~ ~ ~ ~ l st\.h,, and the changed graphs, one ordinate and abcissa, with s h i r t seek markers to indicate distances from the origin, constitute a decided improvement. It is suggested that the few remaining old style sketches and graphs be altered in the next edition, or possibly in t,he next printing.

JAY A. YOUNG Kwa's Cozmon

WIGKOS-BA~RE. PENNBILVANIA

0 QUANTITATIVE ANALYSIS

Albert Frederick Daggett, Professor of Chemistry, University of New Hampshire, and William B u d Meldrum, Professor of Chemistry, Haverford College. D. C. Heath and Company, Baston, 1955. x + 470 pp. Figs. and tables. 16 X 24 cm. $5.

THIS text is divided into two parts; one part contains a general discussion of principles and techniques and the other includes laboratory procedures. The analytical determins, tions are the common, classical ones that have been successfully carried out by students of quantitative analy8is for yearn. They include the common volumetrio and gravimetric methods for simple systems, limestone, and brass. The part on principles and techniques was mitten with the feeling that students enter- ing the sophomore course in elementwy quantitiative analysis have not had sufficient training in some of the basic concepts of chemistry. For this reason the authors include chapters on topics such a8 ibnic theory and quant,it,ntive ionic equilibria.