the perspiration tubes
in the skin. This waste matter must not be left to clog up the little
openings of the tubes. It should be washed off with soap and water.

When children have been playing out-of-doors, they often have very dirty
hands and faces. Any one can see, then, that they need to be washed. But
even if they had been in the cleanest place all day and had not touched
any thing dirty, they would still need the washing; for the waste matter
that comes from the inside of the body is just as hurtful as the mud or
dust of the street. You do not see it so plainly, because it comes out
very little at a time. Wash it off well, and your skin will be fresh and
healthy, and able to do its work. If the skin could not do its work, you
would die.

Do not keep on your rubber boots or shoes all through school-time.
Rubber will not let the perspiration pass off, so the little pores get
clogged and your feet begin to feel uncomfortable, or your head may
ache. No part can fail to do its work without causing trouble to the
rest of the body. But you should always wear rubbers out-of-doors when
the ground is wet. Certainly, they are very useful then.

When you are out in the fresh air, you are giving the other parts of
your body such a good chance to perspire, that your feet can bear a
little shutting up. But as soon as you come into the house, take the
rubbers off.

Now that you know what the skin is doing all the time, you will
understand that the clothes worn next to your skin are full of little
worn-out particles, brought out by the perspiration. When these clothes
are taken off at night, they should be so spread out, that they will
air well before morning. Never wear any of the clothes through the
night, that you have worn during the day.

Do not roll up your night-dress in the morning and put it under your
pillow. Give it first a good airing at the window and then hang it where
the air can reach it all day. By so doing, you will have sweeter sleep
at night.

You are old enough to throw the bed-clothes off from the bed, before
leaving your rooms in the morning. In this way, the bed and bed-clothes
may have a good airing. Be sure to give them time enough for this.

WORK OF THE BODY.

You have now learned about four important kinds of work:--

1st. The stomach prepares the food for the blood to take.

2d. The blood is pumped out of the heart to carry food to every part of
the body, and to take away worn-out matter.