2059. The brain consists essentially of two substances, of one accommodated to the flesh, and one to the bones, or of one arteriose, and the other venous. The former is the gray or cortical, the latter the white or medullary substance. The cortex is the lung of the brain, the medulla the liver or the intestine.
2060. The bark or cortex is the polarizing, active, oxydizing; the medulla the patient or suffering.
2061. This nervous pulmonary substance is continued along the spinal cord and even along the nerves, there as veritable gray substance, here as the vascular membrane of the nervous mass.
Head.
2062. The brain, as being a system that has been separated superiorly from the other systems, determines the Head. The head is only there in so far as a brain is there.
2063. Head and trunk are antagonistically disposed, as Animal and Vegetable, or still more exactly, like nerve and bony flesh are to the viscera.
2064. The head is naught but a nervous organ.
2065. The concomitants of the nervous mass follow the brain, but, instead of the medulla having been previously subordinated to, or at least co-ordinated with, these, it is they that are thus related to the brain. The bones of the brain are the brain-case or cranium, the flesh of the brain, the face or countenance. On the head, bones and flesh have been disposed in the strictest manner according to their dignity or worth. Posteriorly there is almost pure bone, in front almost pure muscle.
2066. The cranium can be none other than the vertebral column continued around the brain. It consists of three vertebræ, the face of one. This will become clear in what follows.
2067. If the bones of the head are the repetition of those of the trunk, so also must the flesh of the head be a repetition of that of the trunk. Pectoral and abdominal muscles are ennobled in the muscles of the face.