e mouth with secretions, and a story with unsavory associations may
completely turn the stomach.

The relationship of mental and physical functions may be illustrated by
entirely removing the spleen of an animal, as that of a dog. An
invariable result of its extirpation is an unusual increase of the
appetite, for at times the animal will eat voraciously any kind of food.
The dog will devour, with avidity, the warm entrails of recently killed
animals, and thrive in consequence of such an appetite. Another symptom,
which usually follows the removal of the spleen, is an unnatural
ferocity of disposition. Without any apparent provocation, the animal
will attack others of its own, or of a different species. In some
instances, these outbursts of irritability and violence are only
occasional, but the experiments show quite conclusively that the spleen
moderates combativeness, restrains the appetite, and co-operates with
the will and judgment in controlling them.

We shall briefly consider the practical question whether the elements of
mind can be ideally arranged and presented, so as to more completely
reveal their relations to, and disclose their effects upon the bodily
functions. Modern philosophers conceive that mind consists of a triad of
essentials; _Intellect, Emotion,_ and _Volition_. Physiologists assign
to the cerebrum its functions, and neurological, as well as
phrenological writers, have located them as represented in Fig. 68.
True, there is no structural division between the parts of the cerebrum
to indicate this diversity of function, nor is there any perceptible
limit between the sensory and motor filaments of the game nerve. As no
one has any reason for denying that separate portions of the brain may
manifest distinct functions of the mind, we shall assume it as a
conceded proposition. The regions of the cerebrum, thus ideally
represented, occupy but little more than half of the arc of a circle,
whereas it is evident that the base of the nervous mass is not idle, and
is equally entitled to our consideration. In the posterior chamber of
the skull is the cerebellum, anterior to, and below which, is the
medulla oblongata, connecting with the spinal cord and sympathetic
system. These various parts are essential to the harmonious blending of
mind and body. To this end, two conditions are necessary. (1.) All the
nervous forces must be so related that action and reaction may be fully
established. (2.) A complete nervo