theory of ionisation and reaction in solution, a fundamental advance in chemical science that owes its origin and development to the work of the Danish school of physical chemistry." I t should be added that Inorganic Chemistry is conservative in that it contains a vast number of old-fashioned molecular equations, which are still of primary importance in teaching chemistry. One finds, also, many ionic equations, hut few electronic equations. Owing to the small size of the book, it was necessary to omit much of the subject matter ordinarily contained in textbooks of inorganic chemistry. More illustrations would be very helpful: greater space could be devoted with profit to minerals and metallurgy: and the addition of problems and questions would be of assistance to the student. If chosen as a textbook I should agree with Professor Donnan that "it should be used with some book that deals with the historical developments of chemical facts and concepts." WILLIAMFOSTER ParxcBroa UNlvansrrv PmNcsroa.
N.J.
O n c m ~ cS Y N ~ E S HVOLS, XVI. John R. Johnson, Editorin-chief. John Wiley & Sons, Inc., New York City, 1936. v 104 pp. 3 f i ~ s . 15 X 23 em. $1.75.
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The current volume of this "Annual Publication of Satisfactory Methods for the Preparation of Organic Chemicals" contains directions for the preparation of: 8-alanine, 4-aminoveratrole, n-butyl nitrite, n-butyl phosphate, coupliag product of otolidine and Chicago acid, sp.-dimethylhydrazine dihydrochloride, unsym-dimethylhydrazine hydrochloride, 23-diietbylpyrrole, 1.4-diphenylbutadiene. epichlorohydrin and epibramohydrin, ethyl phenylmalonate, ethyl n-tridecylate, n-heptoic acid, n-hexaldehyde, isonitrosopropiophenone, methyl benzyl ketone. methylhydrazine sulfate, fi-nitrobenzyl bromide, 4-nitrophthalic acid, 4-nitrolphthalimide, pelargonic acid, phenanthrene-2- and 3-sulfonates, phthalaldehyde acid, phthalide, quinone, mxeinimide. tetrahvdrafurane. containine , . svm.-trithiane. An moendir .. lawr rrftrrnccs ro prrpararionc in preceding vulumcs, additions, and conccrlons for preceding wlumcs, followcd by a subject index. rornolr$cs the volume. The u t k t y of this annual is so well appreciated that no further comment is necessary than to say that the present volume is a worthy addition to a series which is indispensable to the organic chemist. NATW L. D m x ~ ~
~
~.~~
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METUS W D ALLOYS. William Hum6 Rolhery, M.A., D.Sc., Royal Socie* Warren ResearchFellow. Oxford University. Institute of Metals @onograph and Report Series, No. 1. The Institute of Metals, 36 Victoria St., London, S.W. 1, 1936. viii 112 pp. 61 figs. 14 X 21 cm. 3s. 6d.. net.
% STRUCTURE OF
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Resulting largely from the extensive application of X-ray methads to studies of metal and alloy structures during the past fifteen years there has been in this period an extraordinary increase in knowledge and understanding of the relationships between the empirical compositions, structures, and properties of such systems, quite comparable to the revolutionary developments in silicate chemistry during this same time interval. To make these new developments in metal chemistry more available to those not working directly in this field, the Institute of Metals (of Great Britain) asked Dr. Hume-Rathery to write this small hook. I n the reviewer's opinion they could not have picked a more competent man for the job. The author has been in the forefront of the work in this field during this period and is indisputably an authority on the subject. Moreover he has done an admirable job in presenting the essentials clearly and bridy, yet comprehensively. Part I is an excellent 14-page introduction to present conceptions of atomic, molecular, and crystal structures. Part I1 (9
pages) summarizes briefly the crystal structures of the elements, and Part I11 (20 pages) deals with atomic radii. This much of the book 'can be considered as merely introductory to the main subject. The reviewer recommends it not only to those interested in metal and alloy structures but also to those others who want a brief, understandable, authoritative presentation of the subjects dealt with. The remainder of the work, dealing with "Primary Metallic Solid Solutions," "Intermediate Phases in Alloy Systems." and "Imperfections in Crystals and Deviations from the Ideal Lattice." is more technical, yet written clearly in non-technical language and emphasizing throughout the principles involved rather than empirical details. The reviewer offers but two unfavorable criticismsboth minor ones. Although pointing out that Galdschmidt's use of metallic radii for structures containing covalent bonds is not without objection (pp. 35-6) the author makes no mention of the development and use of satisfactory sets of atomic radii (by the reviewer) for just these cases. He also seems unaware of the reviewer's work in 1921 and 1922 relating the crystal structures of the electronegative elements to their atomic structures, giving credit (pp. 24 and 97) for this development to others. The bmk is adequately illustrated by simple, well-chosen, and well-reproduced figures. There are few typographical or other errors. Mamrce L. Huccrhls Tna Joaxs HO=INSU K I V B E S I ~ B A L n r o e H , M*PIYL*ND
GENERAL COLLEGECKBMISTRY FOR
THE
LABORATORY. Rufus
D. R e d Associate Professor of Chemistry, and Robnt W. McLachlan. Assistant Professor of Science, New Jersey State Teachers College. Syllabus form. Lithoprinted, Edwards Brothers, Inc., Ann Arbor, Michigan, 1935. x 87 pp., one side. 11figs. 21 X 27.5 cm. $1.80.
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The purpose of the book "is an attempt to secure a high degree of correlation of laboratory, classroom, and library work in general college chemistry." Twenty-three experiments covering the conventional subjects of general chemistry, followed by an introduction to qualitative analysis, make up the content of the book. I n the qualitative analysis section, preliminary work an all five groups is treated fist. This is followed by the analysis of unknowns in the five groups. No anions are treated. I n stressing the library w o k the authors cite 140 different reference books. Each experiment is introduced with approximately 30 differentreferences. Thirty to forty questions are incorporated in the directions of each experiment. Following many of the questions, the authors cite refeences in which additional information about the exercise may be' found. Supplementary exercises follow most of the experiments. If the students have the time to read the references associated with each experiment, the authors will have accomplished the purpose of their bwk. Most of the references cited in connection with each experiment so overlap and duplicate information as to make one question the number and choice of the references. The most valuable notes-are those taken a t the time the experiment is performed. If, before writing up his laboratory notes, it were necessary for the student to consult the references following the exercise, there would be some danger that the student might color his obs-ations in the light of the references. The amount of work required in connection with most of the experiments appears to be t w much for the conventional freshman laboratory period. It would have been enlightening if the authors had given more information on the practical results obtained from this treatment and the mechanics of its application. In general the book is well written, with few errors, and the directions are clear. The questions in the experiments are challenging and appropriately placed in the body of the experiments.
