EVALUATION OF SUNSCREEN AGENTS 147 With further work, a quantitative method for measuring the color change can be developed, thus making this test more precise. ACKNOWLEDGMENT The author's appreciation is extended to Drs. Louis A. Luzzi and D. E. Cadwallader for their helpful suggestions. (Received August 8, 1966) REFERENCES (1) Urbach, F., Measuring exposure to ultraviolet rays, J. Am. Med. Assoc., 182, 1, 35 (Oct. 6, 1962). (2) Giese, A. C., Christensen, E., and Jeppson, J., Absorption spectra of some sunscreens for sunburn preparation, J. Am. Pharm. Assoc. Sci. Ed., 39, 30 (1950). (3) Giese, A. C., and Wells, J. M., Sweat and water-resistance sunburn preparation, Ibid., 35,208 (1946). (4) Knox, J. M., Sunscreens and their usefulness, Am. Perfumer Aromat., 75, 8, 42 (August, 1960). (5) Parke, R. F., and Sperandio, G. J., Evaluating sunscreen lotions, Drugs Std., 27, 1, 9 (1959). (6) Riegelman, S., and Penna, R. P., Effect of vehicle components on the absorption char- acteristics of sunscreen compounds, J. Soc. Cosmetic Chemists, 11, 5 (1960). (7) Urbach, F., News section, Medical World News, $, 122 (Aug. 14, 1964).

148 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS Society of Cosmetic Chemists •- 9 6 7 Meetings The Society of Cosmetic Chemists will hold the following meetings in 1967' Date Meeting May 2, 1967 Semi-annual Sept. 21, 1967 Seminar Sept. 22, 1967 Dec. 6, 1967 Semi-annual Location Americana Hotel New York, New York Ambassador Hotel Chicago, Illinois Americana Hotel New York, New York