AZIR1DINE CHEMISTRY AND COSMETICS 603 it is the application and the end results desired which determine the PEI to use. For example, in hair shampoos, where the PEI is being utilized to improve combability and manageability, higher molecular weight PEI's appear to be more effective. This may be due to the other components in the formulation, the effect of long PEI chains versus short PEI chains, or the higher molecular weight's faster sorption rate and slower desorp- tion rate. In hair coloring, the lower molecular weights show most utility. All PEI's are substantive to hair but the desired end result de- termines which PEI to use. (Received January 14, 1972) REFERENCES (1) Dick, C. R., and Ham, G. E., Characterization of polyethylenimine, J. Macrotool. Sci., Chem., A4 (6), 1301-14 (1970). (2) Derruer, O. C., and Ham, G. E., Ethylenimine and Other Aziridines, Chemistry and Ap- plications, Academic Press, New York, N.Y., 1969. (3) Procter 8c Gamble, U.S. Patent 3,400,198 (September 3, 1968). (4) Dow Chemical Co., U.S. Patent 3,546,336 (December 8, 1970). (5) Procter & Gamble, U.S. Patent 3,489,686 (January 13, 1970).

604 JOURNAL OF THE SOCIETY OF COSMETIC CHEglISTS Society of Cosmetic Chemists Award Sponsored by International Flavors and Fragrances, Inc. The 1971 Society of Cosmetic Chemists Award sponsored by Inter- national Flavors and Fragrances, Inc., has been presented to Dr. M. S. Christensen, Vick Chemical Co. Mrs. M.D. Lehman, Dr. E. J. Singer, and Dr. L. J. Vinson, all of Lever Brothers Co. and Mr. P. C. Wegmann, N.J. State Health Department, for their paper "Barrier Development, Ultrastructure, and Sulfhydryl Content of the Fetal Epidermis." The award, consisting of a scroll and a $1000 honorarium, is pre- sented annually to the author or authors of the most meritorious paper published in the JovRN^I• OF THE SOCIETY OF COSMETIC CHEMISTS, U.S.A. Formal presentation was made by the Society's President, Dr. Martin M. Rieger, at the May 25th luncheon session during the Society's Seminar in l,os Angeles, Calif. LeJt to right: Dr. Michael S. Christensen, Dr. Edward J. Singer, and the Society's President Dr. Martin M. Ricgcr