Among the Navajoes of Arizona it is customary for the women to wear a strip of sheep-skin, called a “chogan;” when the necessity for its use has disappeared, the woman goes outside of the village and conceals it in the forks of one of the cedar or juniper trees so numerous in the mountains. The author once found one of these; but the people with him were impressed with the idea that no good would come from being near it. At another time he knew of a young boy who had been hit by a “chogan” which had been dislodged by a wind-storm. He was almost frantic with terror, and devoted three or four days to singing and to washing in a “sweat-bath.” The Ostiaks of Siberia would seem to have the same ideas on this subject as the Apaches and Navajoes have.—(See Pallas, “Voyages,” vol. iv. p. 95.) Danielus Beckherius informs his readers that menstrual blood was used in medicine (pp. 23 _et seq._); philters were prepared from it (idem, p. 341). “Zenith juvencarum sc. sanguines menstruum” were given for epilepsy,—that is, the first menses of a girl (idem, p. 42). The lint of the napkin itself was thus given also (idem),—“litura pannorum menstruorum datur patienti sanari morbum comitialium.” The first napkin used by a healthy virgin was preserved for use in cases of plague, malignant carbuncles, etc., dampened with water and laid on the part affected; also used in erysipelas (idem, p. 43, “Med. Microcosmus”). Dried catamenia were given internally for calculi, epilepsy, etc., and externally for podagra; they were also used in treatment of the plague, for carbuncles, aposthumes, being placed thereon with a rag wet with rosewater or oil, into which menstrual fluid had been poured; it was good as a cosmetic to drive away pimples (p. 265). To restrain an immoderate flow of the menses a napkin was saturated with menstrual blood, and then kept for a certain time in an aperture made in the bark of a cherry-tree. “Ad immodicum menstruorum fluxum cohibendum sunt qui pannum menstruum sanguine imbutum certo tempore cerasi radice in cortice apertæ indunt, incisuramque iterum operiunt.”—(Etmuller, “Op. Omnia;” Schrod. “Dil. Zoöl.,” vol. ii. p. 265.) Paullini prescribes the “dried catamenia of women” for the cure of kidney diseases (pp. 142, 143), also for ring-worm, felons, menstrual troubles. Frommann gives the same cure for immoderate menses, by placing the napkin in a cherry-tree.—(See “Tract. de Fascinatione,” p. 1006.) “Excoriationi conferunt ... sanguis menstruus.”—(Avicenna, vol. i. p. 388.)