This observation was correct, insomuch as it separated men from apes, and carrion birds from other birds. But its application to different varieties of men, as a measure of their various degrees of intelligence, was a pretension doomed to be sacrificed to future investigations. Dr. Jacquart, assistant-naturalist in the Museum of Natural History at Paris, calling to his aid an instrument he invented, by which the facial angle is rapidly measured, has, in our day, made numerous studies of the facial angle of human beings. M. Jacquart found that this angle cannot be taken as a measure of intelligence, for he observed it to be a right angle in individuals, who, with respect to intelligence, were in no way superior to others whose facial angle was much smaller. M. Jacquart went so far as to show, that, in the population of Paris alone, the facial angle varies between much wider proportions than those imposed by Camper as characteristic limits of human varieties.
The measure of the facial angle, therefore, is far from bearing the importance which has long been ascribed to it; but this does not go to prevent its application, with advantage, in ordinary cases, when races of men are required to be distinguished from one another.
Erect carriage is another of the characteristics which distinguish the human species from all other animals, including the ape, by whom this position is but rarely assumed, and then accidentally and unnaturally.
Everything in the human skeleton is calculated to ensure a vertical posture. In the first place, the head articulates with the vertebral column at a point so situated that, when this vertebral column is erect, the head, by means of its own weight, remains supported in equilibrium. Besides this, the shape of the head, the direction of the face, the position of the eyes, and the form of the nostrils, all require that man should walk erect on two feet.
If our body were intended to assume a horizontal position, everything connected with it would be out of place: the crown of the head would be the most advanced part, and this would operate most detrimentally to the exercise of sight; the eyes would be directed toward the earth; the nostrils would open backward; the forehead and the face would be beneath the head. Moreover, the whole muscular system and all the tendons are, in man, auxiliary to erect posture, without mentioning the curves which occur in the vertebral column, and the exceptional formation of the limbs, &c.
J. J. Rousseau was, therefore, very far from right, when he contended that man was born to go on all fours.
The height of men, as well as the colour of their skin, are characteristics which must not be overlooked, since they are of importance as distinctive attributes of different races.
And first, with regard to height, the differences which this incident may present in the human species have been greatly exaggerated. Much allowance must be made in admitting what has been written with respect to dwarfs, and what has been alleged concerning giants. The Greeks believed in the existence of a people they called Pygmies, but whose place of abode they always omitted to point out. These were very small people, who were entirely hidden from view when they entered a field of standing wheat, and who passed much of their time in resisting the attacks of Cranes. The same fable was revived in more modern times, with reference to a people supposed to live in the island of Madagascar, who were styled Kymes. But Pygmies and Kymes are equally fabulous.
Antiquity tells us of giants, but without forming them into a separate race. It is rather in modern times that the existence of races of human giants has been put forward. In the sixteenth century, when Magellan had doubled Cape Horn and discovered the Pacific Ocean, a companion of this navigator, Pigafetta, gave an altogether extraordinary description of the Patagonians, or inhabitants of the Tierra del Fuego. He made giants of them. One of his successors, Leaya, adding yet more to the height of the Patagonians, assigned to these men a stature of from three to four metres.