VOL.9, NO. 9
preparation of the solution, and throughout the procedures the use of pressure devices, perchloric acid, cyanides, and other substances or processes which might endanger the student are not included. Hence no attempt is made to provide for the analysis of silicates. The experimental part of the course is designed to cover about sixty hours of work in the l a b ratory and twenty hours in th? classroom. In the appendix is given a table of prope r t k of the more common inorganic compounds, somewhat of the same type as is found in the chemical handbooks. Throughout the book the author strives to make the discussions and explanations as clear as possible. Indeed, there seems to he a tendency t o go into tao great detail in the explanations. A concise definition of equilibrium, such as the author gives on page 41, should not require several paragraphs of illustration involving comparisons to the water level of the Great Lakes and to the deposits in a saving.; bank t o he perfectly clear to a college sophomore who presumably has satisfactorily completed a course in general inorganic chemistry. Even such terms as precipilation, filtration, and residue are carefully defined, although the term normal hydrogen electrode is used without explanation. After the author states that "the reactions of electrolytes in solution are, f~ the most part, the reactions of their ions" and elaborates on this and related themes over several pages of text, it is disappointing t o find that he writes nearly all eqnations in the molecular form and, judging from the sample report, apparently expects his students t o do likewise. Altogether, the book should serve as an excellent tent for use in a course where the student's previous preparation in inorganic chemistry has not hecn extensive and where an elementary course is desired which is simple and quite fool-proof in nature, hut which covers the real fundamentals of qualitative analysis. S. G . SmSON M*SS*CA"SBTTS
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RECENT BOOKS
INSTITUIB
OF TBCYNOLOOY
C ~ ~ a s m c MAssAcHuserre e.
Quantitative Analysis. EDWARD G. MAmN, Ph.D., Professor of Analytical Chemistry and Metallurgy in t h e Zlniversity of Notre Dame. Fourth edition. McGraw-Hill Book Co., Inc., 623 pp. New York City, 1932. av 98 Figs. 14 X 20 cm. $400.
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This book was written originally not ass complete reference work but as a teat for the work to be covered in college courses. giving a reasonable degree of latitude in the selection of laboratory exercises. Eight years have elapsed since the previous edition appeared and the book has been completely revised- in the effort toward better presentation of the subject matter. The section on me.tallography has been omitted and a new chapter dealing with the determination of hydrogenion concentration and rlectrometric titrations has been added. The first 275 pages of the book are devoted to general quantitative analyses with discussion and exercises covering gravimetric, volumetric, and electrn analysis. Since a dinerenee of opinion still exists a$ to the correct explanation of certain processes in quantitative analysis, i t is unfortunate a t the author has limited his discussion to one explanation in such cases as the anodic precipitation of lead dioxide on p. 133 and the action of the Zimmerrnann-Reinhardt solution on p. 226. The reviewer believes also that it would have heen better if the author had included same discussion of precipitation indicavors and the adsorption indicators of Fajans and his co-workers in the chapter devoted to this subject. The second part of the book of 74 pages is devoted t o special measurements including density and specific gravity, heat of combustion, index of refraction, optical rotation, and electrometric titration. The third part of 146 pages covers the analysis of industrial produds and raw materials. In this section is included the analysis of rock and cement, coal and gaseous fuels, burning and lubricating oils, saponifiable oils, water, steel and non-ferrous alloys. agricultural materials such as fertilizers,
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JOURNAL OF CHEMICAL EDUCATION
SEPTEMBER, 1932
still higher are the limits of preparative micromethods in which one endeavors as a rule to obtain 1 cg." "The reasons which compel the chemist t o work with small quantities of substance are varied. Some are obvious, such a-the purely economical ones . . . Moreover, cases also o m where micromethods, because of their simplicity. reliability, or speed, are superior to the macromethods.. .. One is often able t o control substances .whose explosiveness has, up t o now, caused all scientists to recoil from their investigation." CORNBLL UNIVERSITY "Every chemist who possesses a microIm&c&Nsw Yoscope can carry out qualitative microanalysis (inorginic or organic), and where Microchemical Laboratory Manual. FRI~DRICH EMICE, Dr.Phi1.H.C.. Dr.- a microbalance is available, quantitative 1ng.E.H.. Professor a t the Technische (inorganic) determinations are possible." Quantitative organic microanalysis is Hochschule of Graz, W. Mitglied der Akademie der Wissenschaften, Vienna. not presented in this manual. With a section on Spot Analysis by Interest in the microchemical methods is FRITZFEIGL, Privatdozent a t the Uni- increasing and soon all students of chemversity of Vienna. Translated by FRANK istry will be acquainted with them and SCHNEIDBR.Sc.M. John Wiley and will use them in conjunction with the Sons, Inc.. New York City. 1932. xvi macromethods. Each has its place. 180 pp. 14.5 X 23 cm. S . 0 0 . This manual is designed primarily as a Many chemists in the United States, laboratory text and will be welcomed as when referring t o "Microchemistry," con- such by teachers who are now giving insider only the development of organic struction in microchemical methods in quantitative microanalysis by Professor colleges and universities in this country. Fritz Pregl. This is due largely to the Students of chemistry who do not or did award of the Nobel Prize, as well as to the not have such instruction available will rapid adoption of the methods by in- welcome the manual as a means of selfvestigators in the biological fields, who instruction. "The book is divided into two parts. continually meet with small amounts of organic substances in their studies. I t I n the first (general) part, Apparatus and was the knowledge and appreciation of the Methods are described: in the second value of the e d e r and more compre- (specific) part, the application t o a series of hensive work of Professor Emich and co- special cases is demonstrated." Extensive and comprehensive references workers that led Professor Pregl t o develop quantitative organic microanalysis to the major publications in the field inwhen he obtained only a small amount of a crease the value of the manual. Thanks new organic substance after a lengthy and are due to Mr. Schneider, not only for the tedious work involved in translation, but tedious investigation of the bile acids. "The purpose of micromethods is t o for the addition of references to papers work with small amounts of substances. . . appearing after the printing of the German in qualitative microanalysis 'drops' or edition, as well as the consideration given 'droplets' containing, e. g., about 0.001 t o suggestions made by American friends ma. during the course of the work of transla.of active substance are fully adequate: quantitativemicroanalyskisusuallywithin tion. The manual is published in the attracthe range of 2-10 mg. of substance, and
milk, and butter, and fire assaying, The discussions are well written snd concise with numerous references to the original literature. The directions for the laboratory exercises are very dear and definite and no student should have any difficulty in carrying out the various determinations. With the variety of work presented any student who completes the work outlined should have a very gwd conception of the field of quantitative analysis. M. L. NICHOLS
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