. Public school physiology and temperance [microform]. Physiology; Nervous system; First aid in illness and injury; Physiologie; Nerveux, Système; Premiers soins. 108 PHYSIOLOGY AND TEMPERANCE. correct indication of the mental capacity. The shape of the head aflfords no guide to the character or mental endow- ments, as it may be the result of external pressure. But when the front and top parts of the head—that is, that portion in front of the ears—are deep, high and broad, it is evidence of a large cerebrum, and generally indicative of a high degree of brain power. The skull is not of the same
. Public school physiology and temperance [microform]. Physiology; Nervous system; First aid in illness and injury; Physiologie; Nerveux, Système; Premiers soins. 108 PHYSIOLOGY AND TEMPERANCE. correct indication of the mental capacity. The shape of the head aflfords no guide to the character or mental endow- ments, as it may be the result of external pressure. But when the front and top parts of the head—that is, that portion in front of the ears—are deep, high and broad, it is evidence of a large cerebrum, and generally indicative of a high degree of brain power. The skull is not of the same thickness in all persons. Over the eye-brows there is a space between the two tables of bone. The extent and depth of this cavity cannot be determined by out- ward observation. A prominent forehead is often due to a large frontal space. The gray matter covers the white por- tion, and is next to the bone; but it is not spread out on an even surface, nor does it present on its outside a uniform surface. There are a number of rounded edges, called con- volutions, separated by deep furrows. These furrows are merely spaces formed by the convolutions dipping down and returning back in a sort of a fold, just as a seamstress would make a ruffle. These folds vary in depth in diflferent parts of the brain and in different persons. The gray matter not only covers the surface^of the convolutions, but dips down. Fig. 34.—Upper surface of the Brain, showing the convolutions and its double Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Nattress, William; Ontario. Dept. of Education. Toronto : W. Briggs
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