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one case into 1949 and in another only 1944. As would be expected in a subject that covers ~ a c t i a nkinetics, physics and structure, and electrophysics, there is a considerable amount of mathematics. I t is of intorest in a book on general theory that the first chapter is on "Economic aspects." The text is full of tables, figures, graphs, mathematical expressions, and organic structural formulas, all of which add much to the understanding of the subject matter. There is a very good index which consists of twenty-seven columns. The typography of this book is very good and yet there are some letters that are only half printed and some not printed at all. The text contains some misspelled words, and the organic nomenclature does not always conform to American Chemical Society standards. An unfortunate statement on page 72 should he comcted-"butyl ruhber" and "Ameripol" are not synonymous. The book rovers the subject well and contains much good information. When this series of volumes is completed it will he a small encyclopedia on this general subject. HARRY L. FISHER
solutions. The following eight chapters deal with an excellent discussion of protolysis reactions and equilibria, including acidbase indicators, all based on the theory of Brbbsted. The style is concise and exact. This is especially true of Chapter XIII, in which the titration error is discussed on the basis of the classical monograph of N. Bjerrum (1914) and the papers by H. Arnfelt (1937) and A. Orlander (1939). In six chapters s. discussion of solubility, solubility equilibria, properties of precipitates, colloids, precipitation, and complex formation titrations is given. The last two chapters deal with oxidation-reduction reactions and titrations. The monograph does not seem useful in this country as a text for a beginning course in quantitative analysis, not only beca'we no laboratory directions are given, but also because the subject has not been treated exhaustively. For example, electricsl methods of analysis (like electroanalysis, potentiomet,ric titrations), optical methods of analysis, separations in general, use of organic reagents are not discussed. Aside from these limitations the author has enriched the literature of the science of analvtical chemistrv with an excellent t,ext.
many modern textbooks. The present book is warmly recommended to students whose major field of interest is analytical chemistry.
MODERN CHEMISTRY Charles E. Dull, Late Head of Science Department, West Side High School, Newark, New Jersey; William 0. Brooks, Chairman, Science Department, Technical High School, Springfield, Massachusetts; and H. Clarke Metcalfe, Science Department, Brentwood High School, Pittsburgh, Pennsylvania. Henry 564 pp. Illustrated. 16 X Holt & Co., New York, 1950, xi 24 Em.
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THIS edition of "Modern Chemistry" is a complete revision of the successful text by the late Charles E. Dull. It is a wellorganized text. There are sixteen units, each one concluding with "Some things for you to do." The summaries are very good and careful attention hss been given to word study. The materials for superior students are marked thus taking care of individual differences. The latest theories on the structure of matter are presented. I t would be an easy book from which to teach because the pupils themselves could handle the materials so well. Simple language is used throughout, making it easier to read than some high-school chemistry texts. Authors sometimes forget that high-school students are a teen-age group studying chemistry. This is a welcome addition to chemistry texts for high-school use. GRETA OPPE
DIE THEORETISCHEN GRUNDLAGEN DER ANALYTISCHEN CHEMIE Gunnar Hagg, University of Uppsala, Sweden. Translated by H. Baumann, Verlag Virhauser, Basel. 1950. 197 pp. 26 figs. 8 tables. 17.5 X 25 cm. 18 Swiss francs.
INA smce of lem than 200 Danes the author has succeeded in
I. M. KOLTHOFF
INTRODUCTION TO SEMIMICRO QUALITATIVE CHEMICAL ANALYSIS Louis 1. Curtman, Emeritus Professor of Chemistry, The City College of New York, New York City. The Macmillan Co., New 391 pp. 3 9 figs. 24 York, 1950. Revised edition. xvi tables. 14 X 21 cm. $3.50.
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THISrevised edition of a widely used text differs very slightly from the 1942 edition. With the exception of the mention of additional teds for sulfite and fluoride, and the inclusion of a discussion of the basic ferric acetate method far the removal of phosphate, the first 220 pages are identical with those of the earlier edition. The only change (if it can be called that) in the scheme of analysis for the cations is the instruction to evaporate aqua. regia under the hood. Although the author states that "The entire procedure for the systematic detection of the Group 2 anions my own inspection revealed significant has been rewritten. changes only in the section in which the test for chloride is madc, with more attention given to the interference of bromide and iodide. Several notes on the sensitivities of the tests are appended to the procedures in this section. The chapter on semimicro technique and equipment has heen expanded slightly. These instructions are clear and complete; ample illustriutions of manipulations help to make this chapter really excellent. I liked this book when I used the earlier edition; the following comments are not intended to obscure this fact. The instructor who values primarily the experimental side of qualitative analysis will find this book entirely sound. On the theoretical side the book is. in mv ooinion. a bit sketohv in soots. such as 1116 tl.rorg of rcdor rcxtiorw wl.icl~ir cowrcd in 9 page?. As i n rturl,y texts in qualif3tive analysi~,this book gives errone(,us
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should be very useful for that purpose in many European univeni-
page'14.) &apter 11deals with the mass & o n lew'and equilihria: Chanter 111 with the chemical bond (a reference to the
opposing rates of two second-order bimolecular reactions in a homogeneous medium. The trouble is that the student is not told that this is a rather special type of reaction and the serious error comes when this conventiond approach is extended to the zener.4 case that is familiar to us all. No mention is made of the w r y ir!~portaut fort thht 111e r ~ ~ r l l i ~ i e nint s 1 I w y m e ~ ~ l i z ~ 1 1 equilibriuul rnmtnv.1 have no dcpeudc~ccm rater of rrwtiw.. I bets'ceu this Jcrivatiorl nn.1 think t l w r ma). br some eo~nrwt~orl ~
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