THE WORCESTER FOUNDATION FOR I My, Kesh x ‘y, Massachusells 12-07 SF 6 encwaneed wilt, pertbicel pistlers, P cam whitade face The Deon fook, Pincsney pix Got HUDSON HOAGLAND, Ph. ©., Sc. O GREGORY PINCUS, Se. B RALPH !. DORFMAN, Ph. D. Executive Olrectar Girector of Leborotories Associate Director of Laboratories EXPERIMENTAL Bloin oo}