. . "Estrogens such as estrone, l7B-estradiol, ethinyl estradiol, and diethyl stilbesterol; Mt-Emile Permeability Cdnstantfcnilh'rj I Polydimethylsiloxane' 8.0 x Polyhydroxyethylrnethacrylate 8.0 X 10 I Gum rubber 2.0 X 10 Silicone-carbonate .copolymer J 4.0.X I0 Polyethylene 4.7 X l0 Ethylene-vinyl acetate copolymer 7.5 X 10' and salicylamide; 3 l3." . .