Man a triple being--Materialists and illusionists misconceive him--Relation of the soul to the brain and body--The nervous system; illustration--Embryonic condition--Anatomical descriptions unsatisfactory and the phrenological school incorrect--Exterior view of the brain in the head, illustrated and described--The cerebrum, cerebellum, and tentorium--Interior view of the base of the skull--Bones of the head illustrated--Division of the brain into lobes and convolutions, with illustration--Frontal, middle, parietal, tempero-sphenoidal, and occipital--Anatomical plan or grouping of convolutions differs from their actual appearance--View of the superior surface illustrated--Difference between the irregular convolutions and the angular maps--View of the inferior surface of the brain--Illustration and description of the parts--Interior view of section on the median line--Divided and undivided surfaces-_Corpus callosum_ explained--The two brains and their diagonal relations to the body--Penetrating and describing the lateral ventricles--The serum in the brain--Variations of serum and blood--Variations in hydrocephalus and insanity--Our power to modify the brain and change our destiny--Power of education--Responsibility of society--The lateral ventricles the centre of the brain--Base of the ventricles, the great inferior ganglia of the brain, _corpora striata_, and _thalami_--Their radiating fibres inclosing a cavity--The _thalami_ and their commissure and third ventricle--The _medulla oblongata_, cerebellum, and _arbor vitæ_--The _pons Varolii_ and crura of the brain--the _corpora quadrigemina_, pineal gland, fourth ventricle, and _calamus scriptorius_. Man is essentially a triple organization, consisting of the permanent psychic being, intangible to our external senses, but nevertheless so distinctly recognized internally by consciousness and externally or in others, by intuition and understanding, that the psychic is as well understood and known as the physical being. This being is the eternal man--the material body being its temporary associate. The physical being, or material form, consists of the portion directly and entirely occupied by the psychic existence--which is called the brain or encephalon, and is in life also beyond the reach of our senses in the interior of the cranium--and the non-psychic structure, the body, which, though not the residence of the soul, has so intimate and complete a connection with the entire brain that during active life it feels as if it were the actual residence of the soul, so far as sensation and action are concerned.