Summary

Portrait of Henry Ogg Forbes Henry Ogg Forbes A Hand-book to the Primates — Hominidae (1894)

The human brain differs from that of the Man-like Apes in regard to its convolutions and their separating grooves, only in minor characters; but in weight, as in capacity, very greatly. The weight of a healthy full-grown human brain never descends below thirty-two ounces, that of the largest Gorilla, far heavier than any Man, never attains to more than twenty. Yet, "the difference in weight of brain between the highest and the lowest Men is far greater relatively and absolutely than between the lowest Man and the highest Ape."
Source: Wikisource

Portrait of Henry Ogg Forbes Henry Ogg Forbes A Hand-book to the Primates — Hominidae (1894)

Were he to desire it, Man could not, with convenience, walk on all fours: his short and nearly inflexible foot, and his long thigh, would bring the knee to the ground; his widely separated shoulders and his arms, too far extended from the median line, would ill support the fore-part of his body; the great indented muscle which, in quadrupeds, suspends the trunk between the blade-bones as a girth, is smaller in Man than in any one among them; the head is heavier, on account of the magnitude of the brain, and the smallness of the sinuses or cavities of its bones
Source: Wikisource

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