upon its conclusions. The Aryan group of languages is much better understood than any other, for the simple reason that it has been more familiar and accessible to European science. The other groups have been less thoroughly investigated, because so far they have not been studied exhaustively by men accustomed to use them, and whose minds are set in the key of their structure. Even the Semitic languages have been approached at a disadvantage because few Jews think in Hebrew. But a time is fast approaching when Japanese, Chinese, Arabic, and Indian philologists will come to the rescue in these matters, and good reason may be found for revising much that has been said above about the native American, Ural-Altaic, primitive Chinese, and Polynesian groups of tongues.