date the continuous efflux of dead cells from the surface of the skin and the pro- cesses of transpiration will be needed. References and Notes 1. H. Berger, Ardi. Psychiatc Nervenkt 87, 527 (1929). 2. C. D. Hardyck, L F. Petnnovich, D. W. Lilswonh, Science ase, 1067 (1966). 3. E. J. fok R. Meliack, Po