4.3 cubic feet. Correspondence, reprints, speeches, meeting files, subject files, films, videotapes regarding cryosurgery, mediatinoscopy, tobacco studies, and instrument brochures. Contains information relating to the cryosurgical techniques pioneered in the mid 1960s by William G. Cahan. Publicity surrounding Dr. Cahan's surgical procedures led to his receiving numerous letters containing pleas for assistance from people afflicted with various ailments.