familiar to every family circle. Bodily disease often pro-
duces a most marked effect upon the mind, and conversely
the different effect upon certain diseases, of a cheerful or a
depressed mental attitude, is a subject of frequent remark.

Evidence from Scientific Facts. -- When we examine the
less familiar evidence offered us by certain branches of modern
science, we find our previous impressions strongly confirmed.
Thus we learn from pathology, the science of disease, that
disordered conditions of particular portions of the brain tissue
are accompanied by disturbances of definite kinds in con-
sciousness. In this way we learn, for example, that the
destruction or disintegration of the tissue of one region in
the brain is followed by the loss of one's visual memories,
so that one cannot recall the appearance of familiar objects.
A similar disorder in another region costs one the control
of certain muscles in the hand, etc. The science of anatomy
is able to demonstrate structural connections of nerves be-
tween these diseased parts of the brain and the sense organs
and muscles over which consciousness has lost control, thus
supporting the implication of the pathological evidence
already cited. Experimental physiology shows us, that by
stimulating (either mechanically or electrically) certain brain
areas in animals, we can produce movements of definite
muscles, whereas by extirpating these regions we can at least
temporarily cripple the muscles and render the will power-
less over them. By similar excisions of other brain areas we
can cripple definite sense organs. Muscular movements are
also elicited by stimulating the surfaces of the human brain
in cases where accident or operation has exposed the proper
regions. Thus pathology, anatomy, and physiology all point
to the same intimate relation of mind and body and indicate
more specifically than the observations of every-day experi-
ence could do, a fixed and positive relation between definite
parts of the nervous system and such special phases of con-
sciousness as the visual, the auditory, etc.

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