r activity and growth. The removal of adenoids is
simple, and carries with it only temporary pain and no danger. Some
physicians claim that the growths disappear in later years, but even
if that is true, the physical and mental development of earlier years
is lost, and the person is backward in the struggle for life and
achievement.

[Illustration: FIG. 23.--Intelligent expression is often lacking in
children with adenoid growths.]

42. How to Build a Fire. Substances differ greatly as to the ease
with which they may be made to burn or, in technical terms, with which
they may be made to unite with oxygen. For this reason, we put light
materials, like shavings, chips, and paper, on the grate, twisting the
latter and arranging it so that air (oxygen in the air) can reach a
large surface; upon this we place small sticks of wood, piling them
across each other so as to allow entrance for the oxygen; and finally
upon this we place our hard wood or coal.

The coal and the large sticks cannot be kindled with a match, but the
paper and shavings can, and these in burning will heat the large
sticks until they take fire and in turn kindle the coal.

43. Spontaneous Combustion. We often hear of fires "starting
themselves," and sometimes the statement is true. If a pile of oily
rags is allowed to stand for a time, the oily matter will begin to
combine slowly with oxygen and as a result will give off heat. The
heat thus given off is at first insufficient to kindle a fire; but as
the heat is retained and accumulated, the temperature rises, and
finally the kindling point is reached and the whole mass bursts into
flames. For safety's sake, all oily cloths should be burned or kept in
metal vessels.

44. The Treatment of Burns. In spite of great caution, burns from
fires, steam, or hot water do sometimes occur, and it is well to know
how to relieve the suffering caused by them and how to treat the
injury in order to insure rapid healing.

Burns are dangerous because they destroy skin and thus open up an
entrance into the body for disease germs, and in addition because they
lay bare nerve tissue which thereby becomes irritated and causes a
shock to the entire system.

In mild burns, where the skin is not broken but is merely reddened, an
application of moist baking soda brings immediate relief. If this
substance is not available, flour paste, lard, sweet oil, or vaseline
may be used.

In more severe burns, where blisters are form