it with less fatigue by performing half the amount of the labor in
five hours, and the remainder in four hours. The same principle should
be regarded in driving horses and other beasts of burden.

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180. How can the greatest amount of labor be secured with the least
exhaustion to the muscles? 181. Why should not severe labor be imposed
on growing children? 182. How should the muscles be called into
action?

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183. _The muscles should be rested gradually, when they have been
vigorously used._ If a person has been making great muscular exertion
in cutting wood, or any other employment, instead of sitting down to
rest, he should continue muscular action, for a short time, by some
moderate labor or amusement.

184. _If the system has been heated by muscular action, and the skin
is covered with perspiration, avoid sitting down_ "to cool" in a
current of air; rather, put on more clothing, and continue to exercise
moderately. In instances when severe action of the muscles has been
endured, bathing and rubbing the skin of the limbs and joints that
have been used, are of much importance. The laboring agriculturist and
industrious mechanic, by reducing to practice this suggestion, would
thus prevent soreness of the muscles, and stiffness of the joints.

185. _The muscles should be abundantly supplied with pure blood._ This
state of the circulating fluid requires a healthy condition of the
digestive apparatus, and that the skin should be kept warm by proper
clothing, clean by bathing, and be acted upon by pure air and good
light; the movements of the ribs and diaphragm should be unrestricted,
and the lungs should have ample volume and be supplied with pure air.
In all instances, muscular power is greatest when the preceding
conditions exist, as the muscles are then stimulated by pure blood;
consequently, it is of practical importance to the mechanic, the
farmer, the man of leisure, and not less so to the ladies, to observe
these conditions, whatever vocation of life they pursue.

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183. How should the muscles be rested when they have been vigorously
used? 184. What precaution is given when the skin is covered with
perspiration? How may soreness of the muscles, consequent upon severe
action, be prevented? 185. Should the muscles be supplied with pure
blood? When is muscular power the greatest?

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186. _The muscles