rarily at an end. But the general effect of exercise on the body,
aside from the beneficial results on the particular muscles engaged, is
to promote the building up of new lung tissue. Oxygen is received from
the lungs through the blood and is carried to the different parts of the
body, where it serves the useful purpose of carrying off the waste
products of the different organs. If the lung action is inadequate, if
deep breathing in fresh air is not practiced, or if, through laziness,
no exercise is taken, then the amount of oxygen supplied will be
deficient and the body will be loaded up with the toxic products
resulting from decomposition. The exact effect of exercise upon the lung
action may be seen from the fact that under ordinary circumstances a man
breathes about 480 cubic inches of air per minute. If he is walking at
the rate of 4 miles an hour, he inhales air at 5 times this rate, and if
he is walking at the rate of 6 miles an hour, inspiration increases to
seven times this rate, or 3360 cubic inches of air passes through his
lungs per minute instead of 480, as when at rest.

Of course, it is assumed that in the country a person has no lack of
exercise, and that of all men the farmer is in least need of exercise.
But, as a matter of fact, the exercise which he gets is irregular and
confined to certain sets of muscles, rather than to the development of
the whole body. Agility, for instance, quickness of action and immediate
control of the muscles, is far less common in the country than is
supposed, although there is probably no lack in the actual power of the
muscles. It is common observation that among farmers an erect carriage
is less frequently seen than an awkward, shuffling gait. The fact is,
that exercise, to be beneficial, should affect not one set of muscles,
but all the muscles of the body, because the continuous exercise of one
set, while leading first to growth, results later in demolition and
waste. When, however all the muscles of the body are exercised, there is
no demolition or waste, but a healthy growth throughout. Regular
exercise is beneficial, not merely to the muscles involved, but also to
the other organs of the body. Exercise sharpens the appetite, makes
digestion more perfect, and increases the absorptive power of the
intestinal membranes; conversely, lack of exercise, which is found in
the country in the winter, lessens both the digestive power and the
appetite.

_Clothing._

Little