any other way, a change appears in the
heart's action from its effects on the brain, to the high electric
action and that burning heat called fever. If plus violent type (yellow
fever), if minus, low grades (typhus, typhoid, plagues), and so on
through the list.

MENTAL VIBRATIONS.

To think implies action of the brain. We can grade thought although we
cannot measure its speed.

Suppose a person of one kind of business thinks just fast enough to suit
that profession. A man is engaged in raising hogs and that alone. He
must reason on and of the nature of hogs. He begins about so: a hog
eats, drinks, bathes, roots and sleeps. He knows the hog eats grain, so
he feeds it corn, or some other suitable cereal, with plenty of water
and good bedding. The swine is on his mind night and day.

THE WHEELS OF THOUGHT.

Now the question is, how fast does he think? How many revolutions do the
wheels of his head make per minute to do all the necessary thinking
connected with the hog business? Say his mental wheels revolve 100 times
each minute. Then he adds sheep to his business, and if that should
require 100 more revolutions and he takes charge of raising draft horses
with 175 revolutions added, you see the wheels of his head whizzing off
375 vibrations per minute. And at this time he adds the duties of the
carpenter with 300 more revolutions, add them together and you see 675.
To this number he adds the duties and thoughts of a sheriff, which are
numerous enough to buzz his wheels at 1500 more, you find 2175 to be
his mental revolutions so far. Now you have the great physical demands
added to the mental motion which his brain has to support, yet he can do
all so far, fairly well.

OVERBURDENING THE MIND.

He now adds to his labors the manufacturing of leather, from all kinds
of hides, with the chemistry of fine tanning, which is equal to all
previous mental motions. Add and you find 4250 revolutions all drawing
on his brain each minute of the day. Add to this mental strain the
increased action of his body which has to perform these duties and you
see the beginning of a worry of both mind and body, to which you add
manufacturing of engines, iron puddling, rolling, etc.; a delegate to a
national convention, thoughts of the death of a near relative; add to
this a security debt to meet during a money panic. By this time the mind
begins to fag below the power of resistance.

HEMIPLEGIA.

Duration of such great mental