Les Champignons Hallucinogènes du Mexique. Études Ethnologiques, Taxinomiques, Biologiques, Physiologiques et Chimiques. Cover title: Archives du Muséum National d'Histoire Naturelle. Septième Série, Tome VI. [With]: Nouvelles Investigations sur les Champignons Hallucinogènes

Paris: Éditions du Muséum, 1967. Two volumes, large quartos ( x cm.), 322 pages. Frontispiece, title page illustration of Psilocybe Wassonii Heim, Seventeen color plates after watercolors by Heim et al., 20 photographic plates, numerous illustrations in text (some color), 3 maps; [and] 219 pages. Eleven plates (six in color), 34 illustrations in text (some color), map. FIRST EDITION. Wasson's Mexican Mushroom Trip. The lavishly produced, pioneering study of the sacred mushrooms of Mexico, embracing anthropology, archology, natural history and chemistry. Beginning in 1953, Heim accompanied R. Gordon Wasson on his expediitions to Mexico and subsequently brought samples to Albert Hofmann, who isolated the hallucinogenic compounds psilocybine and psilocine at the Sandoz laboratories. The first volume includes Wasson's detailed compilation of historical and archival sources and his discussion of the mushrooms in contemporary Mexico; Heim's descriptive and taxonomic studies; documentation of psycho-physiological effects; and accounts by Hofmann and others of the chemistry and pharmacology of psilocybine. The second volume contains further ethnological and anthropological observations, descriptive studies, and additional accounts of ingestion. Original printed wrappers. A fine, unopened set.