954
NEW
noom
butadiene-l,3, the author had to choose between Kistiakowsky’s boiling poinb ef -4.51’C. a t 757 mm., as determined in 1938, and that of -2.6’C. a t 780 mm., aa determined by Grosse in 1937, and so he has preferred to omit the boldface. There is a natural tendency to examine a volume of this kind with a rather critical mind, and the present reviewer is no exception in this respect. However, if the work has any shortcomings, these are not a t all obvious. On the contrary, university workers and industrial people alike-who are in any way concerned with the properties of hydrocarbons-will find this compilation most useful as a reference work, and they should be thankful to the author for having made available to them the sources of information a t his disposal. Any errors that may have crept in during the assembling and transcription of data cannot be detected in a preliminary review. It remains for the users of this reference work to express an opinion on that point. In the meantime, the reviewer notes with satisfaction that Dr. Egloff has a t least done away with certain frequently quoted erroneous data, such as some of the values which have appeared for the melting point of butadiene and for the boiling point of pentene-1. PERK. FROLICH.
Proceedings of the Sixth Summer Conference on Spectroscopy and its Application. 6 x 9 in. ; 5 figures; vii 172 pp. New York: John Wiley and Sons, Inc., 1938. Price: $3.00. The Technology Press has published in the present volume in somewhat condensed form the thirty-one papers presented a t the Sixth Summer Conference on Spectroscopy held a t the Massachusetts Institute of Technology in July, 1938. The applications to varied fields are well represented, as well as the theoretical aspects. The discussions are not reproduced. 5. C. LIND.
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The Principles of Electrochemistry. By DUNCAN A. MACINNEB. 478 pp.; 150 illustrations. New York: Reinhold Publishing Corporation, 1939. Price: $6.00. In the preface the author emphasizes that the “subject of electrochemistry has become so extended” that i t ww necessary to “severely limit the range of topics considered.” Accordingly, the author has confined himself to the principles of electrochemistry of aqueous solutions,-in particular, very dilute solutions. His treatment of these has been most thorough and is based on many years of careful application to the subject. In the twenty-four chapters the following topics, among others, are considered: the laws of Faraday, electrolytic conductance, electrolytic transference, the principles of thermodynamics, the Debye-Huckel theory, concentration cells, standard electrode potentials, determination of pH, electrometric titrations, the dielectric constants of liquids, electrokinetic phenomena, and pasbivity and overvoltage. Most of the experimental data referred to in the book are of relatively recent origin, having been obtained during the last ten or fifteen years. To all interested in the physical chemistry of solutions this book is highly recommended. COLING . FINK.
