12. If a nerve be pressed upon too long it cannot perform its duty. If I
press upon the nerve passing to my foot, I stop it from communicating with
the brain; the foot loses its feeling, or, as I say, "is asleep."
13. If I drink alcoholic liquors, or snuff, smoke, or chew tobacco, my
brain and nerves cannot do their work well; because alcohol and nicotine
are very poisonous to the brain and nerves.
14. The brain must be supplied with good blood;
The brain must be used;
The brain must be rested;
I must drink wholesome drink, eat wholesome food, take enough exercise, and
breathe pure air, that my brain may be supplied with pure blood;
I must study and think, that my brain may grow and be strong for work;
I must rest my brain when it is tired, either by changing my employment, or
by going to sleep;
I must not poison my brain with alcohol or tobacco.
[3] NOTE.--_A fuller description of the Nerves of the Brain_: Twelve pairs
of nerves pass from the base of the brain; the first pair, called the
nerves of smell, to my nose; the second pair, called the nerves of sight,
to my eyes; the third, fourth, and sixth pairs to the muscles of my eyes;
the fifth pair to my forehead, eyes, nose, ears, tongue, teeth, and
different parts of my face; the seventh pair to different parts of my face;
the eighth pair, called the nerves of hearing, to the inner part of my ear;
the ninth pair to my mouth, tongue, and throat; the twelfth pair to my
tongue; the eleventh pair to my neck; the tenth pair to my neck, throat,
lungs, stomach, and different parts of my body.
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