932 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS (6) (7) (8) (9) (10) (1•) (19) (13) (14) (1.•) Frost, P., and Weinstein, G., Topical administration of vitamin A acid for ichthyosiform dermatoses and psoriasis, J. Amer. Med. Ass., 207, 1863 (1969). Stuttgen, G., Zur Lokalbehandlung von Keratosen reit vitamin-A-S•ure, Dermatologica, 124, 65 (1962). Beer, P., Untersuchungen uber die Wirkung der vitamin-A-S/iure, Ibid., 124, 192 (1962). Karasek, M., In vitro culture of human skin epithelial cells, J. Invest. Dermatol., 47, 533 (1964). Lowry, O. H., Rosebrough, N. J., Farr, A. L., and Randall, R. J., Protein measurement with tile folin phenol reagent, .]. Biol. Chem., 193, 265 (1951). Barnctt, R., and Seligman, A., Histochemical demonstration of protein-bound sulfhydryl groups, Science, 116, 323 (1952). Ayoub, P., and Shklar, G., A modification of the Mallory connective tissue stain as a stain for keratin, Oral Surg., Oral Med. Oral Pathol., 16, 580 (1963). Aydelotte, B. B., The effects of vitamin A and citral on epithelial differentiation in vitro. I. The chick tracheal epithelium, J. Embryol. Exp. Mo,phol., 11, 279 (1963). Lasnitzki, I., The effect of excess vitamin A on the embryonic rat oesophagus in culture, ]. Exp. Med., 118, 1 (1963). Dingle, J. T., Studies on the mode of action of excess vitamin A. Release of a bound protease by tile action of vitamin A, Biochem. J., 79, 509 (1961).

AUTHOR INDEX TO VOLUME 21 Abate, Vincent, Badoux, Violette, Hicks, S. Z., and Messinger, Monroe. Charac- terization of natural and synthetic waxes using combined chromatographic techniques, 119 Adachi, Kcnji, Takayasu, Susumu, Taka- shima, Iwao, Kano, Motonari, and Kondo, Shigeo. Human hair follicles: metabolism and control mechanisms, 901 Arnoore, J. E. Primary odor correlated with molecular shape by scanning com- puter, 99 Badoux, Violette. See Abate, Vincent. Bernstein, I.A. Chemical differentiation in the epidermis, 583 Block, L. H., and Lamy, P. P. The rheo- logical evaluation of semisolids, 645 Bollinger, J. N., and Seelig, L. L., Jr. Ad- herence of vegetable bath oils to kera- tin, 613 Bullough, W. S. The rejuvenation of the skin, 505 Carless, J. E., and Nixon, J. R. Some ap- plications of rigidity and yield values in a study of gelatin and Laponite gels, 427 Carruthers, Christopher. Comparison of several procedures for the extraction of proteins from human epidermis, 169 Cropper, E., and Puttham, N. A. The gas chromatographic determination of fluo- ride in dental creams, 533 Daly, Diane. See Hejna, J. J. Dolan, M. M. See Yankell, S. L. Eckardt, Wolfgang. Physical measurements of fihn formers useful for hair sprays, 281 Elfbaum, S. G., and Wolfram, M. A. Ef- fect of dimethyl sulfoxide and other reagents upon mechanical properties of stratum corneum strips, 129 Elkhouly, A. E., and Woodroffe, R. C. S. Enhanced deposition of trichlorocarb- anilide on skin in the presence of polyethylene glycol 400 monolaurate and sodium chloride, 521 English, J. E. Thermal conductivity effects in the differential thermal analysis of powdered materials, 221 Fairchild, C. M. See Kabacoff, B. L. Felmeister, Alvin, and Schaubman, Ronald. Monomolecular fihns as a model to study photosensitized reactious, 155 Flanner, L. T. Effect of valve body orifice size on propellant/concentrate ratio, 661 Flesch, Peter. The red pigmentary system and its relation to black melanogenesis, 77 Freshwater, D.C. See Lloyd, P. J. Fujiyama, Yoshio, Tahara, Sadaaki, and Kumano, Yoshimaru. Rheological properties of creams upon production scale-up, 625 Garrett, E. R. Prediction and evaluation of emulsion stability with ultracentrifugal stress, 393 Gidwani, Ram. See Sciarra, J. J. Gloxhuber, Christian. Methods for the toxicological study of cosmetics, 313 Gloxhuber, Christian. Phototoxicity of cosmetic materials, 825 Gulbekian, E.V. A group of alkali-thick- enable methacrylate copolymer emul- ,sions, 471 Hall, K. See Wolfram, L. J. Harris, P.D. See Youkilis, G. J. Hejna, J. J., and Daly, Diane. A new ap- proach to the analysis of fatty alkanol- amides, 107 ttersey, J. A. Sampling and assessment of powder mixtures for cosmetics and pharmaceuticals, 259 Hcrzka, A. Powder aerosols, 553 Hicks, S.Z. See Abate, Vincent. Hockett, W. A. See Yankell, S. L. Hui, I. See Wolfram, L. J. Jones, T. M. The effect of glidant addition on the flowability of bulk particulate solids, 483 Kabacoff, B. L., Mohr, G., and Fairchild, C.M. Determination of hexachloro• phene by gas-liquid chromatography of its trimethylsilyl derivative, 683 Kano, Motonari. See Adachi, Kenji. Karasek, M. A. Effect of all-trans-retinoic acid on human skin epithelial cells in vitro, 925 933