The sweat bath is in frequent use, both as a religious rite of purification and as a hygienic treatment. Like everything else in Indian life, even the sanitary application is attended with much detail of religious ceremony. Fresh bundles of the fragrant wild sage are strewn upon the ground inside of the sweat-house, and a fire is kindled outside a short distance away. In this fire stones are heated by the medicine-men, and when all is ready the patient or devotee, stripped to the breechcloth, enters the sweat-house. The stones are then handed in to him by the priests by means of two forked sticks, cut especially for the purpose, and with two other forked sticks he puts the stones into the hole already mentioned as having been dug in the center of the lodge. Water is then passed in to him, which he pours over the hot stones until the whole interior is filled with steam; the blankets are pulled tight to close every opening, and he sits in this aboriginal Turkish bath until his naked body is dripping with perspiration. During this time the doctors outside are doing their part in the way of praying to the gods and keeping up the supply of hot stones and water until in their estimation he has been sufficiently purified, physically or morally, when he emerges and resumes his clothing, sometimes first checking the perspiration and inducing a reaction by a plunge into the neighboring stream. The sweat bath in one form or another was common to almost every tribe in the United States, but as an accompaniment to the Ghost dance it seems to have been used only by the Sioux. It may have been used in this connection among the Shoshoni or northern Cheyenne, but was not among any of the tribes of the southern plains. The Ghost-dance sweat-house of the Sioux was frequently made sufficiently large to accommodate a considerable number of persons standing inside at the same time. [Illustration: PL. XCIV SIOUX SWEAT-HOUSE AND SACRIFICE POLE]