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JOURNAL OF CHEMICAL EDUCATION
complex phenomena in relatively simple words. Nor does he hesitate to talk directly with the student, giving in a conversational tone, definite and excellent suggestions far bath study and review. The text indudes unusually splendid charts which show in a graphic manner the relationships existing between numbers of compounds of any given series. These charts are well presented and illustrate a fine point in teaching. They add greatly t o the value of the text. The table of contents is unusually full, being in effect almost an outline of the text, chapter by chapter. Problems, review questions, and suggestions are to he found a t the end of each chapter. Approximately two-thirds of the hook is devoted t o the development of aliphatic chemistry and the remainder to a somewhat briefer treatment of the aromatic and heterocyclic compounds. At the end of the aliphatic chapter is a review chapter and very good chart showing the main relationships of the several classes of eompounds of this section. These wellordered and well-selected charts constitute a most sdmirable point in this new text. A small thing hut indicative of the author's attempt to make the text usable for the beginner is that where a substance is listed in the index in more than one place, the reference is given each time rather than the more usual custom of referring the student from the least t o the more common name. This text is well written and well puhlished and should prove a worthwhile addition t o the too few good introductory texts in this field. It is notable: (I), in its effort t o present organic chemistry as a unified whole; (2), in its informal and forceful style; (3). in its attention t o and constant use of review, and (4). in its successful presentation of the subject in such a manner that the beginning student can really get the subject. O. R. QuAyLE J. SAMuEL Guy EYOPY UNIVBBSIZY ElroaY, G e o a G r ~
O c ~ o s s 1931 ~,
The Colorimetric and Potentiometric Determination of pH. I. M. KOLTHOPP, Ph.D., Professor of Analytical Chemistry in the University of Minnesota. John Wiley and Sons, Inc., New York 167 pp. 35 figs. City, 1931. xi 15 X 23 cm. $2.25.
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This hook is designed to serve as a text and partial laboratory manual for a six-credit, two-quarter course in the theory and methods for the colorimetric and electrometric determination of acidit". Although based on the well-known works of Kolthoff and F m a n on Indicators and Potentiometric Titrations, i t is in no sense merely an ahbreviation of them, hut is a complete, although not comprehensive, work in itself. It is divided into three parts--~olorimetric methods, potentiometric methods, and conductimetricmethods. Each section hegins with a first-class discussion of the theory involved and is followed by a rather detailed description of the various methods. These descriptions are sufficiently detailed for any one with areasonable background in physical chemical methods t o follow with ease. The errors and pitfalls of the various methods are carefully called t o the attention of the reader. Each chapter is closed with a series of excellent problems based on the preceding material. The hook closes with an outline for a practical course involving the methods previously described. Numerous tables of data furnish most of the material needed in connection with the experiments and problems. Like the other Kolthoff books, it is well supplied with references. Dr. Kolthoff does not claim that this hook is in any sense comprehensive, yet i t is the reviewer's opinion that one thoroughly familiar with its contents should have a very good grasp of this most interesting and important subject. The book may he recommended highly to all teachers of ohvsical chemistrv who . . offer any work in their courses along these lines, even though they may not be in a
VOL.8, No. 10
RECENT BOOKS
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raphy of texts and papers. There is included also an index of names and one of subjects. The hook is well written, clear, and Umv~asrru ov MARYLAND Co~~eo PAaa. e M*nn*No logical. The author has succeeded in presenting material in so-called Modern B. LOEB. Physics in a manner that is interesting The Nature of a Gas. LEONARD University of California. John Wiley and understandable for those who are and Sons, Inc., New York City. 1931. interested simply in science in generalx 153 pp. 11 figs. 14.7 X 22.7 em. readers who are intimidated by the usual ?$2.50. complicated language and mathematical This text is Monograph No. 1 published symbols of the specialist in this field. under the auspices of the Committee on While written from the viewpoint of a this book should he useful to Electrical Insulation of the Division of .~hvsicist . Engineering and Industrial Research, the stu? .lt of chemistry, furnishing him National Research Council. with concise, intelligible information on the work accomplished to date in a field The book is divided into three parts: Introduction, The Kinetic Picture of a in which both are so vitally concerned. I t should be especially valuable to engiGss, and Ionization Phenomena. The first deals with the electrical structure of neers "who are concerned with the probatoms and molecules. Starting with the lems of the behavior of dielectrics as insufundamental properties of the electron lation," in that i t provides basic inforthe author presents in logical sequence the mation on the nature and electrical properC m s . G. EICHLIN necessary factors that lead to the generally ties of a gas. UNIVERSLTY OF M I Q Y L A N D accepted present-day ideas of atomic C o u ~ o eP m x , MD. nuclei, the extranudear structure of the The First Course in Quantitative Analysis. atom, and molecular structure. FLOYDHAMILTON FISH, MS., Ch.E. The second chapter explains the beProfessor of Analytical Chemistry, the havior of atoms and molecules in gases Virginia Polytechnic Institute. P. under normal conditions from the point Blakiston's Son & Co., Inc., Philaof view of kinetics. I n i t are discussed 120 pp. 3 figs. delphia, 1931. x Avogadro's Number, Joule's Law, Mean 19 X 13 cm. $1.25 net. Free Path, Molecular Velocities, and the Law of Equipartition of Energy, concludPart I of this little hook is arranged for ing with a summary that provides a engineering and applied science students qualitative picture of a gas. and Part I1 for agricultural and home The third part is concerned with atoms economics students; the difference being and molecules disturbed from their nor- in the nature of the laboratory exercises. mal electrical states. I n this portion are In Part I these consist of the preparation discussed "the conditions causing such and standardization of the commoner disturbances, the laws governing them, volumetric solutions and their use in the and the nature and extent of the dis- titration of various mixtures of hydroxide. turbances produced." The author treats bicarbonate, and carbonate of sodium, and of the various general phenomena in eain the determination of iron, copper, and citation and ionization, together with chlorine. The gravimetric exercises are special reference to ionization in gases. the determination of iron and sulfate in a In the appendix are tables of molecular salt, and moisture loss on ignition, SiOs, constants, such as molecular radii, molecu- R,O1, CsO, and MgO in limestone. Part lar velocities, mean free paths, a table I1 uses some of the exercises of Part I of useful constants and conversion fac- but contains mostly work in feed and tors, and a rather comprehensive bibliog- fertiliw analysis.
position to give a complete course on them. MALCOLM M. HARING
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