pose in
mentioning it, however, is that this comparatively slight trouble may
not be mistaken for true bronchitis.

[Illustration: The Lungs and other internal organs.]

Breathing, Correct Method of.--The capacity of an ordinary pair of
lungs is about 250 cubic inches. In ordinary breathing, however, we
only take in from 20 to 30 cubic inches. Hence the necessity for
practising correct deep breathing.

Correct breathing requires cultivation and effort at first, afterwards
it will become unconscious. The head should be thrown back, the
shoulders squared, and a slow deep breath gradually inspired through
the nose till the lungs are filled throughout with air. The expiration
should be just as gradual with relaxation of every muscle. It is most
important that the _lower_ part of the chest should first be filled by
depressing the diaphragm (the muscular floor of the lungs). Some
practise is needed before this habit is acquired, but it is well worth
cultivating. Place the hands on the sides of the abdomen while
inspiring, to feel that _this_ is expanding. Teachers of singing insist
on diaphragmatic breathing, which is also of great benefit to the
stomach, liver, and other organs. By the movement it gives to the
intestines their action is also assisted, and constipation is
prevented.

This deep breathing may be practised several times each day (say ten
breaths at a time) till the habit of correct breathing is acquired. It
will be found to have a wonderfully soothing and calming effect (_see_
Worry). Such exercise should always be taken in the open-air, or in a
room with a widely open window. A good plan is to take them in bed
before rising, with little or no clothes on, while lying flat on the
back.

Paleness, langour, irritability, and general ill-health result from
insufficient breathing. Furthermore, the system becomes unable to
resist disease. We know no aid to beauty more effective than the
practice of deep breathing.

Breathing, in Going Uphill.--_See_ Breath, and Nerve.

British Cholera is to a certain extent epidemic--that is, it affects a
large number of people in a particular place, being, it is believed,
conveyed mainly by the common house flies. War should be waged against
these, and great care taken to guard food, especially that of children,
against them, by using covers, etc. If this were done the appalling
death-rate in summer from this disease among the young would be largely
reduced. Typhoid f