Studies on Experimental Infections with T. Rubrum in Humans and the Mechanism of Griseofulvin Effect**From Mycology Research Unit, Department of Dermatology and Venereology, K.E.M. Hospital, Parel, Bombay 12, India.The Research Grants were provided jointly by (1) K.E.M. Hospital and Seth G.S. Medical College Research Society and (2) Messrs. Sarabhai Chemicals (Private) Ltd., Baroda.The main findings incorporated in this paper were presented at the meeting of the American Academy of Dermatology and Syphilology, Chicago, December 9, 1959.