chemists will he much better served by giving a. redly detailed classified hibliography." This bibliography consists of 103 pages, of which 17 pages are devoted to theory. Unfortunately, these references are not numbered; and the reader may not he able to find readily the papers that would delve more deeply into the topics discussed in the text. The treatment of membrane potentials is marred by a n erroneous equation (No. 3, p. 68) and by misleading statements. The printing could be improved. The symbol i n is used to denote natural logarithm. Many equations are very poorly spaded. The number of misprints is comparatively large. WILLIAM RIEMAN. I11 RaToens U N ~ Y E R B ~ T Y NEW BRDNBWI(.K. NEWJEROEY
ENZYMES: UNITS OF BIOLOGICAL STRUCTURE AND RTNCTION Edited by Oliver H. Goebler, Head, Biochemistry Department, Edsel B. Ford Institute for Medical Research, Detroit. Aeademic Press. Inc., New York, 1956. 624 pp. Figs. and tables. 16 X 23.5 cm. $12. THISbook is a record of the proceedings of an International Symposium on Eneymes held a t Henry Ford Hospital, Detroit. November 1-3. 1955. I t was disciplines to discuss topics of common interest. Contributions were made by 44 participants from the fields of microbiology, biology, genetics, physiology, pharmacology, biochemistry, and biophysics. I n addition to the formal papers, the book contains the general disr:ussions as they occurred. The six general topics which were considered are: the origin of enzymes, the status of the gene-enzyme relationship, enzymes and cell structure, enzymatic basis of some physialogicsl functions, eellular energy souroes, and regulation of enzyme activity. I n all the discussions there is emphasis a n current research and unsolved problems. The value of this discussion has been enhanced by speedy publication (May 1, 1956). I n view of the wide range of subjects discussed, this book will be of interest to research people in many fields related to biochemistry. In reading the record, one cannot helo hut feel the stirnulatine atmos-
is quite advanced and there is not much introductory material, but adequate references are provided. The hook is recommended as a n up-to-date survey of the t,apics discussed. ROBERT A. ALBERTY Umvmsrru or Wreoomrlr Mmrsor*.Wrscaxsm
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VOLUME 34, NO. 1, JANUARY, 1951
