2055. In the brain therefore the tendency must principally reside, to give off nerves, and perfect them into self-substantial nervous organs. 2056. In man the brain with its nerves curves round like a crosier, and that more perfectly than in any other animal. The spinal cord therefore in the highest formation of the brain returns again parallel to the direction, in which it has ascended. 2057. In the brain there is of necessity the greatest quantity of nervous mass. The brain is the nervous trunk, as the _liver_ is probably the vascular trunk. 2058. In the brain the cystic formation has been most purely represented; as e. g. in the cerebral cavities or ventricles. The brain is the stomach of the nervous system or its lungs. 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. 2068. The face must have been principally formed by the orifice of the intestine--the mouth, and by the opening of the lungs--the nose, and by the apex of the vascular system--the members which are repeated as jaws. The month is the stomach in the head, the nose the lung, the jaws the arms and feet.