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

AUTHOR INDEX TO VOLUME VI Andrew, Warren, The Anatomy and His- tology of Aging Skin, 299 Baker, William B., Tropical Uses of Several Antibiotics: Vehicles Employed, 313 Baumler, A., The Structural Proteins of Epi- dermis and Their Possible Relation to Aging skin, 324 Birmingham, Donald J., Alterations in the Skin Physiology Following Continuous Use of Soaps and Detergents, 3 Bouillette, Pierre L., William A. Poucher, The Pioneer, 69 Carruthers, C., The Structural Proteins of Epidermis and Their Possible Relation to Aging Skin, 3:24 Chase, Herman B., The Physiology and Histochemistry of Hair Growth, 9 Conrad, Lester I., Acetylated Lanolin Deriv- atives, 344 Crockett, R. H., The Evaluation of Commer. cial Alkyl Sulphates, 1:24 Dusenbury, J. H., The Effect of Bilateral Structure on the Chemistry of Keratin Fibers, 356 Epstein, M. B., Foam Transitions and Foam Persistence, 370 Flesch, Peter, Newer Aspects of Epidermal Differentiation, 14 ¾1esch, Peter, Laboratory Testing of the Effects Upon the Skin of Topical Agents, 161 Flesch, Peter, The Chemistry of the Aging Skin, 377 Greenwald, Harold L., Theory of Emulsion Stability, 164 Hazleton, L. W., The Evaluation of Chemi- cals by Application to Animal Skin, 178 Henderson, Edward, Social and Economic Aspects of Skin Geriatrics, 382 Holmes, G. E., The Collapsible Tube, 107 Ivanovsky, I.., Wax and the Cosmetic Chem- ists, 130 Jeffries, E. B., The Effect of Bilateral Structure on the Chemistry of Keratin Fibers, 356 Lauffer, P. G., Location of Books on Cos- metic Formulations, 49 Lennon, W. J., Acylated Amino Acids in Shampoos, 407 Littlejohn, W. R., On Purchasing Essential Oils, 260 Lubowe, I. I., The Uses and Newer Applica- tions of the Silicone Compounds in Derma- tology and Cosmetics, 19 Lutton, E. S., The Polymorphism of Glyc- erides--An Application of X-ray Dif- fraction, 26 Marriott, R. H., pH Value and Its Implica- tions, :289 Motiuk, Kalmen, Acetylated I.anolin Deriv- atives, 344 Paton, H., White Oils, 245 Pickthall, J., The Effect Upon Emulsions of the Hydroxy Compounds in Beeswax, :263 Polan, E., Records and Costings in the Per- fumery and Cosmetic Industry, 251 Poucher, William A., A Classification of Odours and its Uses, 80 Powell, E. W., The Skin as a Community of Structures, 118 Powell, E. W., The Skin as a Community of Structures--Part II, 276 Powers, Donald H., Annual Report of the President, 1 Ross, Sydney, Toward Emulsion Control, 184 Rostenberg, Adolph, Jr., The Sequence of Events in the Development of an Eczema- tous Sensitization, 34 Rothman, Stephen, The Mechanism of Per- cutaneous Penetration and Absorption, 193 Shorts, H., The Structural Proteins of Epi- dermis and Their Possible Relation to Aging Skin, 3:24 Smith, W. B., Development of a Detergent Test--Part I, 96 Smith, W. B., Development of a Detergent Test--Part II, 239 Spoor, Herbert J., Correlation Between Animal and Human Testing of Materials Used in Skin Care, 200 Strianse, S. J., Location of Books on Cos- metic Formulations, 49 Taylor, A., Development of a Detergent Test--Part I, 96 Taylor, A., Development of a Detergent Test--Part III, 239 Thomas, H. Gregory, William A. Poucher, The Man, 76 Tillotson, C. C., Some Physical Chemical Properties of Stearic Acid, 40 Traub, Eugene F., Correlation Between Animal and Human Testing of Materials Used in Skin Care, :200 Whitman, Ross, The Mercaptan-Disulfide System in Permanent Waving, 387 Wilson, Abraham, Film Properties and Com- pound Formation in the Sodium Lauryl Sulfate-Lauryl Alcohol-Water System, 392 Witten, Victor H., Some Uses and Limita- tions of Radioactive Isotopes in Cosmetic Chemistry--From a Dermatologist's Point of View, 399 Woernley, D. L., The Structural Proteins of Epidermis and Their Possible Relation to Aging Skin, 3:24 Zussman, H. W., Acylated Amino Acids in Shampoos, 407 429