Race-type corresponds in the Old and New World. A comparison of languages by means of the vocabularies of the two continents, yields no such correspondence. All the more, therefore, is the American student of comparative philology stimulated to investigate the significance of the polysynthetic characteristic found to pertain to so many—though by no means to all—of the languages of this continent. The relationship which it suggests to the agglutinative languages of Asia, furnishes a subject of investigation not less interesting to American students, alike of the science of language, and of the whole comprehensive questions which anthropology embraces, than the relations of the Romance languages of Europe to the parent Latin; or of Latin itself, and all the Aryan languages, ancient and modern, not only to Sanskrit and Zend, but to the indeterminate stock which furnished the parent roots, the grammatical forms, and that whole class of words still recognisable as the common property of the whole Aryan family. Sanskrit was a dead language three thousand years ago; the English language, as such, cannot claim to have endured much more than fourteen centuries, yet both partake of the same common property of numerals and familiar terms existing under certain modifications in Sanskrit, Greek, Latin, Slavonic, Celtic, German, Anglo-Saxon, and in all the Romance languages. Thus far the American philologist has been unable to show any such genealogical relationship pervading the native languages; or to recover specific evidence of affinities to languages, and so to races of other continents. There are, indeed, linguistic families, such as some already referred to, indicating a common descent among widely dispersed tribes; but this has its chief interest in relation to another aspect of the question.