this position favors the passage of the contents into the duodenum.
Lying on the back is injurious, since by so doing the spine becomes
heated, especially if the person sleeps on feathers, the circulation is
obstructed and local congestions are encouraged. The face should never
be covered during sleep, since it necessitates the breathing of the same
air over again, together with the emanations from the body.

THE AMOUNT OF SLEEP. The amount of sleep required varies with the age,
habits, condition, and peculiarities of the individual. No definite rule
can be given for the guidance of all. The average amount required,
however, is eight or nine hours out of the twenty-four. Some persons
need more than this, while others can do with less. Since both body and
mind are recuperated by sleep, the more they are exhausted the more
sleep is required. A person employed at mental labor should have more
than one who is merely expending muscular strength. Six hours of
unbroken sleep do more to refresh and revive than ten when frequently
interrupted. If it is too prolonged it weakens and stupefies both body
and mind. If an insufficient amount is taken the flagging energies are
not restored. Persons who eat much, or use stimulants generally require
more than others. To sleep regularity is desirable. If a person goes to
bed at a certain hour for several nights in succession, it will soon
become a habit. The same holds true with regard to rising. If children
are put to sleep at a stated hour for several days in succession, it
will soon become a habit with them.


CLEANLINESS.


"Cleanliness is next to godliness," and is essential to the health and