[42] The phenomena of “demoniac possession” are so remarkable, and so frequent in lower conditions of culture that they have been defended as the actual influence of evil spirits by intelligent modern observers (see the work of Rev. Dr. Nevins, _Demoniac Possession in China_, etc.). Bishop Calloway says most of the negro converts in Natal have such attacks after embracing Christianity (_Jour. Anthrop. Society_, vol. i., p. 171). Brough Smith describes such attacks among the Australians. Strong men are suddenly seized with violent convulsions. They dance wildly, scream at the top of their voices, foam at the mouth, and continue until utterly exhausted. They are homicidal when in this condition, and their companions fear to approach them (_The Aborigines of Victoria_, vol. i., p. 466). [43] The most complete study of this subject in connection with the development of religions is the work of Dr. Otto Stoll, _Suggestion und Hypnotismus in der Völkerpsychologie_ (Leipzig, 1894). [44] Bishop Calloway, in _Jour. Anthrop. Institute_, i., p. 177; and in his _Religious System of the Amazulu_, p. 232. The Bushmen explain it as “a kind of beating of the flesh,” which tells them the future, and where lost things may be found. They add: “Those who are stupid do not understand this teaching.”—Bleek, _Bushman Folk-lore_, p. 17. [45] A. E. Gough, _Philosophy of the Upanishads_, p. 243. [46] Klemm, _Allgemeine Culturgeschichte_, Bd. ii., s. 337; A. M. Curr, _The Australian Race_, vol. i., p. 48. [47] Curr notes this among the Australians, _ubi supra_, vol. i., p. 48; and it is general among American Indians. [48] W. W. Gill, _Myths and Songs from the South Pacific_, p. 35. [49] Middendorf, _Keshua Wörterbuch_, s. v. [50] _Proceedings of the American Association for the Advancement of Science_, 1896. Sect. H. [51] On the meaning of _huaca_ see von Tschudi, _Beiträge zur Kennt. des alten Peru_, p. 156; Bertonio, _Vocab. de la Lengua Aymara_, s. v. [52] The probable identity of Heb. _Iah_ with Chald. _Iah_ is acknowledged by Pinches, Sayce, and other eminent Assyriologists (see an article by the former, in the _Proc._ of the Victorian Institute for 1895). That the Greek Iachus is from the Chaldeo-Syrian (as his myth claims, referring to him as “The Assyrian stranger,” etc., L. Dyer _The Gods in Greece_, p. 165) was maintained by Herodotus, Macrobius, and Plutarch, among the ancients, and by various modern authors. It can be shown, however, that _Yah_ as a name of God was derived from a sacred interjection or cry of the same phonetic value, which recurs repeatedly in the cults of America, Polynesia, and Australia. This is also true of _hua_ or _wa_, the radical of the English “God.” They are both what have been called “universal” radicals.