Some people have
become famous through their hobbies. They are excellent for keeping the
mind fluid, which helps to retain physical youth.
There is something peculiarly beneficial about tending and watching
growing and unfolding things. It is well known that women remain young
longer than men. We have good reason to believe that one of the causes
is their intimate relation with children. Growing flowers, vegetables,
chickens and pups have the same influence in lesser degree. Tender,
helpless things bring out the best qualities in our natures. We can not
be on too intimate terms with nature, so, if possible, select a hobby
that brings you closely in contact with her and her products.
CHAPTER XXIII.
BREATHING AND VENTILATION.
The respiratory apparatus is truly marvelous in beauty and efficiency.
Medical men complain about nature's way of constructing the alimentary
canal, saying that it is partly superfluous, but no such complaint is
lodged against the lungs and their accessories.
The respiratory system may be likened in form to a well branched tree,
with hollow trunk, limbs and leaves: The trachea is the trunk; the two
bronchi, one going to the right side and the other to the left side, are
the main branches; the bronchioles and their subdivisions are the
smaller branches and twigs; the air cells are the leaves.
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