e between the development
of the two is this; that the exercise of the blacksmith's right arm
quickens the activities of all the bodily functions, whereas the
employment of the intellect does not offer any healthy equivalent.
Physical exercise is a hygienic demand, but intellectual employment
exerts no salutary influence on the body, while it is constantly
expending the nutritive energies of the blood. The emotions, likewise,
make exhaustive draughts upon nutrition to supply the waste of brain
substance, just as certainly as physical labor causes muscular change,
and demands reparation. One expends cerebral, the other, muscular
substance. The one is healthful in its general tendencies, the other,
comparatively wasteful and destructive.

/ DISINTEGRATING,
The intellectual faculties are { EXPENDING,
\ DERIVING.

/ ENGROSSING,
The emotive faculties are { EXHAUSTING,
\ DEVITALIZING.

These nervous forces are transformed into spiritual products.

The base of the anterior lobes of the brain belong to the atonic
region--the source of those languid, deranging influences which coincide
with morbidity and disease. A disturbance of the corporeal organs, which
especially influence this portion of the brain, naturally tends to the
development of insanity or imbecility. Morel has traced, through four
generations, the family history of a youth who was admitted to the
asylum at Rouen while in a state of stupidity and semi-idiocy. The
following summary of his investigations illustrates the natural course
of degeneracy as it extends through successive generations: immorality,
depravity, alcoholic excess, and moral degradation, in the
great-grandfather, who was killed in a tavern brawl; hereditary
drunkenness, maniacal attacks, ending in general paralysis, in the
grandfather; sobriety, but hypochondriacal tendencies, delusions of
persecutions, and homicidal tendencies in the father; defective
intelligence in the son. His first attack of mania occurred at sixteen,
and was followed by stupidity, and finally ended in complete idiocy.
Furthermore, there was probably an extinction of the family, for the
son's reproductive organs were as little developed as those of a child
of twelve years of age. He had two sisters who were both defective
physically and morally, and were classed as imbeci