836 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS Temperature and humidity influence on stratum corneum and relation to skin chapping, 239 Toxicity, acute and long-term, and biologi- cal changes due to application of skin lightening compounds, 727 Triethanolamine myristate-Freon propel- lant systems, relationship between properties of emulsions and foams of, 87 -mineral oil-Freon propellant systems, relationship between aerosol emulsions and foams from, 623 Ultraviolet, analysis in evaluation of unique sunscreen formulations, 541 radiation on skin, phoreography for de- termination of effect of, 3 Ureas, N- l-naphthyl-N'-phenylenecarboxy- alkyl-, •as sunscreening substances with ,affinity to skin, 317 use in chromatographic separation of cosmetic products and raw materials, 753 Water, and relationship to skin, 197 as source of contamination in cosmetics manufacture, 655 Wettability of hair fibers by hair spray res- in solutions, 501 Wrinkles, histopathology of, 81