public ceremonies, or directly participate in the tribal dances. The power of the shaman being directly dependent upon his personal acquisition of a connection with the supernatural world, an understanding of the method by which this acquisition takes place generally furnishes also a pretty accurate idea of the nature of his functions and influence. The most common way of acquiring shamanistic power in California, as in so many other parts of the world, is by dreaming. A spirit, be it that of an animal, a place, the sun or another natural object, a deceased relative, or an entirely unimbodied spirit, visits the future medicine-man in his dreams, and the connection thus established between them is the source and basis of the latter's power. This spirit becomes his guardian spirit or "personal." From it he receives the song or rite or knowledge of the charm and the understanding which enable him to cause or remove disease and to do and endure what other men cannot. In California, with a few special exceptions, the idea does not seem so prevalent as elsewhere that this guardian spirit is an animal. Occasionally it is the ghost of a person who has once lived, usually a relative. Perhaps most frequently it is merely a spirit as such, not connected with any tangible embodiment or form, either human, animate, or inanimate. The belief that the shaman acquires the spirits most frequently in dreaming is prevalent through the whole Sierra Nevada region and in many other parts of the state. In certain regions another important method, that of the waking vision and trance, is recognized. The person is in a wild desolate place, perhaps hunting. Suddenly there is an appearance before him. He becomes unconscious and while in this state receives his supernatural power. On his return to his people he is for a time demented or physically affected. After he again becomes normal he has control of his supernatural influences. Such beliefs prevail in part among the Yuki and Athabascans of the Coast Range and the Maidu of the Sacramento valley, and no doubt occur more or less sporadically in other regions.