Anhalonium Lewinii (Mescal Buttons)
A Study of the Drug, with Especial Reference to its Physiological Action upon Man, with Report of Experiments
Prentiss and Morgan conducted the first American clinical study of peyote at Columbian University on buttons supplied by ethnologist James Mooney. They recorded physiological effects alongside subjects' first-person accounts of visions, including kaleidoscopic colors and dissociative experiences.
September 16, 1895
Academic Article
D. W. Prentiss