and Volume Relationship; Normal Solution; Balancing Equations; Graphical Representation; Logarithm Tables; Index. The author's aim in presenting this book is t o provide the student with a clear explanation and solution of all of the tommon types of calculations of general chemistry and much of the field of quantitative analysis. Over four hundred carefully selected problems, affording intensive drill work in the application of principles, are included in the book. Some noteworthy features of the hook are: (1) discussion of the significance of the decimal point, and "code answers" which require the student t o check the accuracy of his calculations. e. g., 2.23 per cent of 183-ode answer. 408 (page 5); (2) problems "to he solved by inspection'' (page 63) ; (3) heats of reaction (page 66); (4) in balancing oxidation-reduction equations by the valence change method, 8. g., a metal with nitric acid, the formula for nitric acid is written twice t o indicate that which is reduced and that which is not reduced (page 110); (5) an excellent treatment of the methods of "graphical representation" (Chapter 8) which fills a long felt need. Experienced teachers may find the conventional method of solving problems involving the gas laws by the common equation
P V - P'V' -=
T
DBABQO.N.MICU~OIN
T'
a s outlined by the author, less desirable than methods which involve only direct reasoning from the gas laws. The author makes good use of the direct reasoning methods, as contrasted with so-called formula methods, in his treatment of weight and volume relationships (e. g., page 65). A more extensive application of "mol fraction" (page 58) would perhaps be welcomed by some instructors. I n this connection, the title of Chapter 9, "Normal Solution," would be more comprehensive if it were "Molar and Normal Solutions." The inclusion of problems on gravimetric and volumetric analysis and the exclusion of problems on the mass law, ionic equilibria, etc., will he a disappointment t o teachers of qualitative analysis. The frequent usage of the terms, "you," "the student," "a warning," etc.. should hold the attention of the student and add interest t o material which, in mare conventional style, would appear t o be dry reading, a t least for some students. The text appears t o be remarkably free from errors. The reviewer, however, did not check the numerical answers t o problems. Teachers of general chemistry are indebted t o the author for presenting in this book the material developed from his extensive teaching experience, and will find it very helpful both as a reference in limited courses and as a required text, where sufficient time is available t o do extensive work in chemical arithmetic. A. J. CURRIER P B N N s n v a m * sr*rx cor,.*os STATB C O L ~ O BP ,B N N S ~ V A N ~ A
ELEMENTARY GENERAL CHEMISTRY. John C. Hogg, M.A.. M.C.. Chairman, Science Department, The Phillips Exeter Academy, and Cherles L. Bickd. Ph.D., Instructor in Chemistry, The Phillips Exeter Academy. D. Van Nostrand Co.,Inc., New 603 pp. 197 figs. 13.7 X 21.5 cm. York City, 1941. x $2.12. As indicated by its title this b w k is a text for beginning students in chemistry a t the high-school level. The authors recognize the difficulties which beset the chemistry student and have attempted to smooth them out without removing them. They seek t o make the book a challenee - t o the intellectual capacities of the pupil. The book is divided into two sections. The early chapters cover all of the topics listed as minimum requirements in the latest College Entrance Examination Board Syllabus. The later chapters deal with extension syllabus topics. I t is the recommendation of the authors that, where possible, two years be devoted t o the chemistry course; in their text the first section of twelve chapters would wnstitute the first year's work under such a plan. I n selection and treatment of material this text occupies a
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position about midway between the average high-school text and the typical college general chemistry text. The book is obviously designed far the use of pupils who seek a thorough basis in the principles of chemistry, and who plan t o make active use of chemical knowledge in a professional way. Such topics as Le Chatelier's principle, the ionization constant, and chemical ealculations are treated in detail. The book obviously is not designed t o teach chemistry from the standpoint of general education. One searches the index in vain for such items as photography, fertilizers, plastics, or colloids. The format of the book is attractive and it is well bound. Excellent use has been made of charts and tables as teaching aids. The language used is clear and as simple as the subject matter allows. Directions for 161 teacher demonstrations are included a t appropriate points in thetext. I n almost all cases the probable outcome of the demonstration is also stated. While this may be of value in case the demonstration is merely t o be read, it deiinitely limits the appeal and teaching value of the demonstration as actually performed. ROBERTL. EBEL EDISONI N S T I ~ HIGH T B SCHOOL IDBNT~FICATION OP PURE ORGANIC COMPOUNDS. TABLESOF DATAON SELECTED COMPOUNDS OF ORDERI. Ernest H a d i n
Huntress, Ph.D., Associate Professor of Organic Chemistry, and Samucl Parsons Mulliken, Ph.D.. Late Professor of Organic Chemistry, Massachusetts Institute of Technology. John 691 pp. Wiley and Sons, Inc., New York City, 1941. xvii 15 X 23 cm. 57.50. The present book is not merely a revision of Volume I of the late S. P. Mulliken's "Identification of Pure Organic Compounds," published in 1904. I t is in large part a new contribution with significant differences in the mode of treatment and in the order of arrangement of subject matter. Other volumes will be published when ready. There are described tests for 1364 selected wmuonnds of carbon and hvdroren. or of carbon. hvdroeen. and oxve&. .- . in d.a c e of the 2300 of the 1804 edirion. ~el;ctioihas been made on the basisof interest, cornmcrcial importance, and possible commercial value. One notes particularly the great increase in the dewriptive matter under each compound, and the very thorough documentation that was all but lacking in the original edition. About 7200 literature citations are given and approximately 70 per cent of these represent work published since 1920. The majority have been examined in the original, and the tests themselves have been used in the laboratories of the Massachusetts Institute of Technology for many years. Compounds are classified in nine genera on the basis of generic tests, applied in order until one is positive. Assignment t o a division or section within a genus is made upon the basis of physical properties including specific gravity, and also on occasion by special tests. Substances within a genus are of course classified according t o order of ascending melting or boiling points. The A new feature is the inclusion indexes -~ of - the book are excellent. of melting-point sequence tables of drrintives. This work will prove indispencahle to the organic chemist, as was the original hook hy hlulliken.
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A T ~ L oa E COMMONHAZARDOUS CH~MXCALS.Committee on Hazardous Chnicels and Explosiues of the Nnlional Fire Protection Association and American Ckmnical Society. Fifth Edition. National Fire Protection Association, Boston, 1941. 28 pp. 15.3 X 23 cm. $0.20. This pamphlet contains, in tabular form, the name, usual shipping container, fire hazard, life hazard, storage precautions, fire-fighting phases, and remarks concerning the common hazardous chemicals.
