The extensive researches of Dr. Prichard have satisfactorily shown that the peculiarities of the Negroes and Hottentots are not permanent nor abruptly marked, but local and evanescent, and that they melt away by nice shades of gradation, corresponding with the minute progressive transitions of climate that are traceable through the various regions of the African continent. Hence the _possibility_ of the identity of the Negro and Hottentot Tribes with the inhabitants of the other three great continents may be clearly inferred. But no evidence has yet been produced calculated to establish this conclusion as a positive truth. This desideratum the aid of philology will be found satisfactorily to supply. In the North of Africa the physiological difficulties which are encountered in the Middle and South do not exist to the same extent in any instance, and in most instances they can scarcely be said to exist at all. The Berbers—the original population of Morocco and the adjoining countries, the lineal descendants of the ancient Numidians—approach very closely to the Spanish population of the opposite coasts of the Mediterranean; and the Egyptians in the north-east of Africa are much more alike to the contiguous Asiatic nations than they are to the Negro Tribes. Hence it follows that the theory that the Negroes and Southern Africans are distinct Races of men, may be as decisively tested by a comparison of their languages with those of the Northern Africans, as by collating them with the languages of the other continents of the globe. The mode of comparison adopted in Appendix A, has been dictated by these considerations. Accordingly, I have therein separated the languages of Africa into three divisions, those of: 1, North Africa; 2, Negro-land; 3, South Africa; allotting a separate column to each division; while on the opposite page a separate column is devoted to each of the continents of Asia, Europe, and America. This comparison will serve at once to show the general connexion of the African languages with those of Asia, Europe, and America, and at the same time to demonstrate another proposition of nearly equal interest, viz. the close mutual affinity of the languages of Northern, Tropical, and Southern Africa. With respect to the particular words selected for comparison, I have chosen the names for the following objects: “Fire, Sun, Day, Eye,(22) Moon, Heaven, a Human Being, Man and Woman.” (Homo, Vir, Fœmina, _Latin_.) The most important parts of the Human Frame, (viz. “The Hand, Arm, Foot, Leg, Ear, Tongue, Head.”) “Water.” These terms comprise nearly all the specimens of the languages of Africa, which have been collected in “the Mithridates,” of Adelung and Vater. The objects to which these terms have been applied are comparatively few. But for reasons about to be explained, the evidence which may be deduced from the terms themselves is neither scanty nor imperfect, but, on the contrary, very extensive and complete.