BOOK REVIEWS 427 to chemical data, the balance being engineering facts and tables. There are better handbooks on both chemical and engineering tech- nology.--M. G. t)ENAVARRE. SOLVENTS MANtSAL, by Cyril Mars- den. Elsevier Press, Inc., Houston, Texas. 1954. 429 pages, indexed. Price $12.95. A compilation of solvents, criti- cally evaluated and selected by the author, based on data accumulated during the course of his profes- sional work. Solvents are described through the agency of their properties, source and manufacture, indus- trial grade, azeotropes, physiologi- cal properties, storage, handling and manufacturers. The appendices give test methods and other per- tinent data in 47 pages including an index of trade and proprietary The solvents data seem complete, including many solvents used in cos- metics though carbitol is not given. No typographical errors were noted. Checking the index of trade names, Cellosolve is erroneously defined as ethyl glycol many items are left out and some given do not belong in the list, such as Santo- merses. A valuable adjunct is a solvents solubility chart separately found in the inside book cover.--M. G. DENAVARRE. PRACTICAL PHYSIOLOGICAL CHEM- ISTRY, by Philip B. Hawk, Bernard L. Oser and William H. Summerson. Blakiston Co., Inc., New York 22, N.Y. 1954. 1439 pages, 6 X 9 inches, indexed and illustrated. Price $12. Though the title is over fifty years old, it is quite misleading. Actually the book is a large labora- tory test manual, since most of the material is "test methods." The contents are up to date including a thorough chapter on steroids, radioactive isotopes and the helix theory of protein struc- ture. The illustration on page 108 show- ing palmitic acid is meaningless unless corresponding figures show at least stearic acid as well. One would like to see more on lipoproteins, including appropriate tests. While it is true that the book deals mainly with test methods, the same are introduced with a compact discussion of a given physiological subject. The present volume is considerably larger than the previous edition which raises two questions, namely (1) whether to divide the material into two volumes, one on tests and the other on physiological chemis- try and (2) delete much old material resulting in a more useful book.-- M. G. DE•5•'AVARRE. ELECTROMETRIC pH DETERMINA- TIONS, THEORY AND PRACTICE, by Roger G. Bates. John Wiley and Sons, Inc., New York 16, N.Y. 1954. 331 pages, 6 X 9 inches, illustrated and indexed. Price $7.50. It has been time for a book to appear on the subject of the present one. Determination of pH has changed much since the indicator method became popular. The present effort is largely theoretical though practical applica- tion is included. One would like to see Chapter 9 give a comparison of one type of pH meter against another, instead of reviewing their construction and theory only. How does one take

428 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS the best care of a pH meter? What does one look for when the meter fails to give true zero without the use of buffer? These are a few of the questions answered by the book. Automatic titrators are also dis- cussed. This portion of the chap- ter is needed. All in all, anyone doing pH work with a commercial pH meter will need this reference.--M. G. •)E- NAVARRE. INDEX TO ADVERTISERS American Cholesterol Products, Inc ..................... xi Atlas Powder Company .................... Inside Back Cover Baker Chemical Co., J. T ............................. xviii Chiris Co., Inc., Antoine .............................. xxiv Continental Chemical Co .............................. xxvii Cosmetic Laboratories, Inc ............................ vi Dodge and Olcott, Inc ................................ ii, xix Evans Chemetics, Inc ............................... xxi Firmenich, Inc ....................................... vii Givaudan-Delawanna, Inc .................. Inside Front Cover Goldschmidt Chemical Corp ........................... iv Halby Products Co ................................... • Kohnstamm & Co., Inc., H .......................... ii• Kolmar Laboratories, Inc ............................. xii• LaWall & Harrisson .................................. xxvi• Leberco Laboratories ................................. xxv• Maimstrom and Co., N. I ............................ xxi• New Jersey Zinc Company, The ...................... xxvii• Parento, Inc., Compagnie .......................... xi• Polak and Schwarz, Inc ............................... x Raymond Laboratories, Inc .......................... viii Reheis Company, Inc ................................. xiv Rhodia, Inc •:• ......... .. •. ........................... xxvii Robinson Wagner Co.,,,I•fic ..................... xxx Rohm and Haas CoralSany ......................... xvii Roubechez, Inc ...... ' ................................. xxvi Schimmel & Co., inc ................................. xxvi Snell, Foster D., Inc .................................. xxv Stepan Chemical Co .................................. xx United States Testing Co., Inc ......................... xxv van Ameringen-Haebler, Inc ........................ v Vanderbilt, R. T., Co ............................... xxiii Verley, Albert and Co., Inc ........................... xv Verona Chemical Company ......................... ix Will and Baumer Candle Co ................ Outside Back Cover