The results of the Cambridge expedition to the Torres Straits have shown that in acuteness of vision, hearing, smell, etc., these peoples are not noticeably different from our own. We conclude that the remarkable tales adduced to the contrary by various travelers are to be explained, not by the acuteness of sensation, but by the acuteness of interpretation of primitive peoples. Take the savage into the streets of a busy city and see what a number of sights and sounds he will neglect because of their meaninglessness to him. Take the sailor whose powers of discerning a ship on the horizon appear to the landsman so extraordinary, and set him to detect micro-organisms in the field of a microscope. Is it then surprising that primitive man should be able to draw inferences which to the stranger appear marvelous, from the merest specks in the far distance or from the faintest sounds, odors, or tracks in the jungle? Such behavior serves only to attest the extraordinary powers of observation in primitive man with respect to things which are of use and hence of interest to him. The same powers are shown in the vast number of words he will coin to denote the same object, say a certain tree at different stages of its growth. We concluded, then, that no fundamental difference in powers of sensory acuity, nor, indeed, in sensory discrimination, exists between primitive and civilized communities. Further, there is no proof of any difference in memory between them, save, perhaps, in a greater tendency for primitive folk to use and to excel in mere mechanical learning, in preference to rational learning. But this surely is also the characteristic of the European peasant. He will never commit things to memory by thinking of their meaning, if he can learn them by rote. In temperament we meet with just the same variations in primitive as in civilized communities. In every primitive society is to be found the flighty, the staid, the energetic, the indolent, the cheerful, the morose, the even-, the hot-tempered, the unthinking, the philosophical individual. At the same time, the average differences between different primitive peoples are as striking as those between the average German and the average Italian.