VOL.8, NO. 9
RECENTBOOKS
sirable alternative for the sulfuric acid method. The use of absolute alcohol in the preparation of ethyl iodide, and especially of ethyl ether, seems unnecessary. The rather frequent recommendation t o use a small fractionation column as an every-day aid in the laboratory is to be applauded, as it leads to purer products, sometimes to larger yields, develops a more critical attitude in the student, and is manipulatively much better than the usual rapid distillations from side-arm flasks. The familiar types of laboratory columns can he made by any glassblower, and the efficient Snyder column is now on the market in a student size. * The manual gives examples of most of the operations important in elementary organic laboratory work, and of many of the important general reactions and methods of preparation. As in previous editions, the early experiments arc described rather minutely, and each laboratory operation is treated in the same way the first time it is used. Throughout the book the directions are specific and clear, and valuable informative notes are appended in many places. In the opinion of the reviewer this manual is more carefully and thoughtfully prepared from a chemical and pedagogical point of view than any other with which he is familiar. I t is an especially good book for that fortunate hut perhaps rather rare combination: the teacher who is willing to teach and the student who is anxious to learn. Depending upon the nature of the course, some of the questions may be omitted, but for the usual "long" course in college or university, preparation to answer any of the questions, and others which are pertinent, should be insisted upon. If the teacher is willing to do the necessary individual quizzing, the student will review his "theory," and examine reference books and literature references, in preparation for the quizzes and will he led to associate the laboratory work and the "theory" which it illustrates. This
* Supplied
by the Arthur H. Thomas
Co., Philadelphia.
1905
manual is well adapted t o such a system of instruction, and if properly used will yield excellent results. The format and typography are quite up to the Wiley standard. E. C. WAGNER UNIVBBSlTY OF PBNNSYLYANI*
P.nL*oELPn.*.
PENN*.
Qualitative Chemical Analysis. LOUISJ. CURTMAN, Associate Professor of Chemistry in Charge of the Division of Qualitative Analysis, The City College-The College of the City of New York. The Macmillan Co., New York City. x 539 pp. 39 figs. 14.5 X 21 cm. ~
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This hook includes procedures for the analysis of the anions and the cations, with directions for a systematic analysis of alloys and minerals soluble and insoluble. Considerable space is taken up with the discussion of theoretical principles, such as the theory of ionization, chemical equilibrium, solubility product, complexion formation, and oxidation-reduction. Emphasis is given to equations, particularly those involving oxidation-reduction. The hook is divided into five parts. Part I deals with the theory of qualitative analysis and special apparatus. I n Part I1 the metal ions and their reactions are considered very fully. Part I11 is given over to calculations in connection with solution, double decomposition, and oxidation-reduction reactions. Part IV contains preparatory work, preliminary experiments, and schemes for analyzing the cations. I t also contains preliminary experiments on the anions, and analysis of simple substances. The last part takes up the anions in detail, and treats such special subjects as the interference of the anions in the analysis of the cations of Group 111, the phosphate complication, the preparation of solutions far cation analysis. metals and alloys, and systematic analysis. I n accordance with the author's view, the book has been arranged in such a way. that students who can spend only one semester in qualitative analysis can study the metals thoroughly and consider the
1906
JOURNAL OF CHEMICAL EDUCATION
SEPTEMBEE, 1931
direct precipitation method, the determination of sulfur in pyrites instead of barium sulfate, an expansion of the procedures of the analysis of brass t o cover the analysis of bronze, and an introduction to the principles of potentiometric titrations. The book is divided into three parts. Part I (7 pages) takes up general considerations of quantitative analysis and, among other things, stresses the necessity of a m a c y and points out the methods by which i t may he obtained. Part I1 (128 pages) is devoted to the subject of volumetric analysis. The correct use of measuring apparatus is first discussed. and then procedures for the determination of various substances by neutralization, oxidation, and precipitation methods are given. In Part I11 (93 pages) gravimetric analysis methods are discussed; also a number of procedures for the precipitation and conversion t o weighable products, and calculations of the amount of desired substance are given. In the Appendix (21 pages) the methods and apparatus for potentiometric titrations are outlined and several tables are given. This hwk presents the fundamental U N ~ Y ~ R S OF ITY MINNBSOTII MINNBISOLIS.MINNESOTA principles of quantitative analysis in a correct manner. The stoichiometric treatAn Intmduetory Course of Quantitative ment of problems is clear and thorough and Chemical Analysis. HENRY P. TALBOT. is well designed to give students a fine Revised and rewritten by L. K. HAMIL- understandina - of this important phase TON and S. G. SIMPSON of the Massa- of quantitative analysis. The problems chusetts Institute of Technology. after each discussion of stoichiometric p i n Seventh edition. The Macmillan Co., eiples are well chosen for the further deNew Pork City, 1931. xii 253 pp. 8 velopment of and understanding by the figs. 14 X 21.5 cm. Price $2.50. student of the principles underlying voluThis revised, rewritten, and enlarged metric and gravimetric calculations This (50 pages) edition follows in material is one of the new features of the seventh and general arrangement the sixth edition edition and has added materially to the of 1921. The changes and additions in- value of the book from a teaching standpoint. clude a thorough discussion and presentaThe procedures and methods of analysis tion of stoichiometric principles relative cover a wide field and are ample to give a t o the various procedures, together with numerous problems for application of the student a solid foundation in this important branch of chemistry. principles. The book is practically free from typoThe changes in laboratory procedures include the analysis of chloride by the in- graphical errors and misstatements. We
acids only briclly. However, this short course inclu2es a thorough treatment of the theory, cakulations, and laboratory work on cation analysis and the identification of simple substances. The material for this short course is given in the first four parts of the book. Part V is for those students who wish t o take a second semester in qualitative analysis. This section considers anion analysis in considerable detail and also gives procedures for the analysis of complex mixtures. The author has succeeded well in carrying out his intentions. The b w k is well written and is very nearly free of typographical errors. I t appears that too much attention has been given to cells, and to the occurrence and properties of many substances. There is also considerable repetition. Much of it has resulted from the author's endeavor to make the book cover both a shorter and a longer course in qualitative analysis. There is a wealth of material contained in the hook. Numerous problems with their answers add to its value. Sections on equations and theory are especially good. I t is the opinion of the reviewer that the book will be widely adopted. M. C. SNEED
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