In conclusion, an evaluation of the relative importance of the peyote vision and of the medicinal and tonic properties of Lophophora Williamsii in relation to the diffusion and tenacity of the peyote cult may be summarized as follows: 1. The peyote vision is incidental and of little significance, as shown by the following considerations: (a) peyote visions are relatively rare; (b) peyote visions are not sought, but are often avoided as wrong; (c) proselytes almost without exception neglected the mention of visions as an appeal; (d) early writers did not, as a rule, emphasize peyote visions; (e) peyote has not confined itself to the Plains culture area, but has spread to other areas where the vision was of little importance in adult life. and 2. The therapeutic and tonic properties of peyote are fundamental and primary importance, as indicated by the following considerations: (a) all proselytes stressed the curative powers of the plant, sometimes to the exclusion of all other virtues; (b) most early writers mention the panacean uses of peyote; (c) most early peyote leaders were converted through a cure; (d) peyote is widely used in daily life and in the peyote ceremony as a medicine and stimulant, and has been shown to possess actual therapeutic possibilities; (e) the curing rite is an important part of many peyote ceremonies; (f) peyote origin myths are built upon the theme of the remarkable therapeutic and tonic powers of the plant; (g) the use of the words meaning "medicine" for "peyote" in many tribes signifies a deeply rooted and general understanding of peyote as a medicine.