"
What is necessary if you would have a strong, healthy brain?--"My brain
must be used; my brain must be rested; my brain must be supplied with pure
blood."
How must you use your brain?--"In thinking and studying."
How may the brain be rested?--"By sleep."
In what other way may the brain be rested?--"By thinking of something
different from that which made it tired."
What two brain-poisons have you learned about?--"Alcohol and tobacco."[4]
With what may you show the harm done by alcohol to the gray part of the
brain?--"With alcohol and the white of an egg."
How could you show it with these?--"I would pour the alcohol upon the white
of the egg."
What would then happen?--"The white of the egg would harden as if it had
been boiled."
What is in the white of an egg?--"Water and albumen."
Where else may we find albumen?--"In some seeds, and in the gray part of
the brain and the nerves."
What harm does alcohol do to the nerves?--"It takes away their moisture and
hardens them."
What harm does this do to them?--"It paralyzes them, or makes them lose
their power."
What happens when nerves are paralyzed?--"They lose their power over the
muscles; they are unfit to carry messages to and from the brain.
Pages:
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74