SO JOURNAL OF CHEMICAL EDUCATION

physical chemistry Lies not in the mathematics itself but in the application of simple mathematics to complex physical situations. . . .The derivations are important because the essence of the subject is not in the answers we have today, but in the procedure that must be followed to obtain these and tomorrow's answers." There is no quarrel with this view, but some of the mathematics included is far from "simple," and even so there are places where mathematical difficulties make it necessary to omit parts of der- ivations. Compromise with completeness in such a hook is al- ways necessary; in this one, the "compromise" is a t a. fairly high level.

Next to the level of maturity, the most notable feature of the book is the historical approach. Not only are many of the sub- jects introduced with an account of their historical background, but they we developed in such a way as to make clear that the ideas in question are still being formulated and revised.

The hook contains more than can be covered in two semesters. The chapters on atomic and nuclear physics are designed as background reading, and not even all the rest can be covered thoroughly in two semesters, or probably even in three, unless the students are far better grounded in mathematics and physics than one has any right to expect of undergraduates. But, al- though the book is unified and progresses with considerable logic from one subject to another, appropriately selected sections can be omitted.

The second edition differs very little from the first. There are some errors, and numerous places where a good case can be made for treatment different from that given, but on the whole the hook is well and skillfully written.

In view of the large number of ~ymbols used and especially of the necessity on occasion of using the same letter to signify different quantities, a glossary of symbols would be helpful. For those few who want to use such a book for self-education, the problems would be more useful if some answers were given.

WILLIAM E. CADBURY. JR H*"a;n~on~ C O L L E ~ E

H*VERPORD. PENNBILY*NI*

0 THE CHEMISTRY OF SYNTHETIC DYES AND PIGMENTS

Edited by H. A. Lubs, Organic Chemicals Deparhent, E. I. du Pont de Nemours & Compan.1. A. C. S. Monograph No. 127. Reinhold Publishing Carp., New Yark, 1955. xiv + 734 pp. 15.5 X 23.5 cm. $18.50.

Tms critical, compact, and up-to-date mongrapb has been wrib ten by men who have spent the major portion of their pro- fessional careers in the field of dyes, pigments, and related intermediates. While no attempt has been made to treat the subject in the encyclopedic manner, it is obvious that every major type of dye and organic pigment has been described adequately. The editor makes appropriate reference to the importance of the dye industry in the American economy where i t serves ss a full reserviar of organic chemicals from which we may expect important future developments.

Following 100 pages of discussion of the important dye inter- mediates related to benzene and naphthalene, the following specific topics are considered: Azo Dyes (84 pp.), Azoio Dyes (46 pp.), Sulfur Dyes (32 pp.), Anthraquinone Dyes and Intcr- modiatetes (215 nn.1. Indieoid Dves (25 on.). Phthalocvanine Dves

list of important sulfonic acid intermediates, and a very welcome critical bibliography arranged according to the specific topics previously considered in detail.

The publisher's allegation that this work is the ultimate in dye chemistry probably would have gone unchallenged had this volume appeared in 1951. The existence of Venkataraman's two-volume treatise, published in 1952, makes some sort of com- parison advisable, however. The Lubs work does not include

snecific chanters devoted to the measurement, of color or t,o t,he

Because it contains only half as many pages as the earlier work, it is obvious that the Lubs work must omit some detail. In this reviewer's opinion all libraries should possess both treatises; the individual purchaser may pay $29.50 for 1442 pages (Venka- taraman) or $18.50 for 734 pages (Lubs). Unless he be an expert in a particular phase of dye chemistry i t ie not likely that he will have any firm preference for either work, taking into eonsidera- tion their relative size and cost.

EDWARD R. ATKINSON DEWEY AND AMY CHEMICAL CO.

CAMBRIDB~. M A ~ ~ A C K U B L T T B

0 CATALYSIS. VOLUME 11: FUNDAMENTAL PRINCIPLES (PART 2)

Edited by Paul H. Emmett. Reinhold Publishing Corp., New York, 1955. vi + 473 pp. 61 figs. 53 tables. 15.5 X 23.5 cm. 512.

Tms book is the second of R. series dealing comprehensively with catalysis. The editor Paul H. Emmett is wellknoanforhis research and contributions in the field of catalysis. The first hundred pages, written by W. B. Innes, deals with heterogeneous catalytic vapar-phase reactions in 8 systematic manner, and makes intensive use of tables to present a. large number of litera- ture referenoes. This chapter brings up to date the compilation begun in "Catalysis" by Berkman, Morrell, and Eglaff, and includes pertinent comments. The second chapter, by A. Wheeler, deals authoritatively with reaction rates and selectivity in catalyst pores. Thia chapter provides a physical and msthe- matical picture of reactions in catalyst pores and also discusses experimental techniques and several catalytic reactions. The next two chapters, comprising about one-fifth of the text, are written by H. M. Hulburt. Chapter 3 deals with the nature of estslytic surfaces from the electronic viexpoint of modern solid- state physics. Current theariessre capably di6cus6ed nith re~pect to semiconductors, metals, and dislocations. Chapter 4 is con- cerned with the nature of complexes on the surfaces of catalysts sucb : ~ s oxides, metals, promoted metals including alloys, and also with the problems of surface heterogeneity. Chapter 5, which "resents the eeneral theories of heteroeeneons catalvsis. is writ-

. . . hensively with catalysis in homogeneous reactions in a liquid phase, and takes up about a quarter of the book. In this chapter theories of kinetics, rate laws, and reaction mechanisms are discussed dong with aoid-base catalysis, effects of medium and complexing agents, catalysis in redox reaotians, negative cataly- sis, and miscellaneous examples.

This text presents an up-to-date appraisal of the current status of the above-mentioned and related topics, and completes the consideration of fundamental principles initiated in Volume I. The present volume maintains the high standards set by the first volume and the authors have rendered an imoortant service in

to develop adequate theories and to evaluate the numerous, at present conflicting points of view. Anyone having a serious in- terest in cat.alysis will want to be familiar with this text, and the forthcomine volumes of the series will be awaited with much

W. W. RUSSELL