as nearly air tight as is possible. To accomplish this the
windows must be tightly closed, the doors locked, and the cracks and
keyhole sealed with pieces of paper or adhesive paper. The room should
remain closed for six or eight hours, after which it should be
thoroughly aired for several days.

The After Treatment of a Disinfected Room.--The walls, ceiling, and
all flat surfaces, such as mantels, window-sills, etc., should be washed
with a fresh chloride of lime solution. The floor should be scrubbed
with a four per cent. soda solution. All carpets and curtains, if any,
should be removed, taken to a vacant lot and thoroughly beaten and then
exposed to direct sunlight for a number of hours. The room should then
be well aired again for a couple of days before it is again occupied.

How to Disinfect the Bed Clothing and Clothes.--The surest way is to
boil them for half an hour; otherwise they may be left in the room while
it is being disinfected. Spraying the clothes with a spray of
formaldehyde is an effective way of disinfecting them.

MUMPS: EPIDEMIC PAROTITIS

Mumps is a contagious disease. It is most common between the fourth and
sixth years. Infants are rarely affected. The disease is not very
contagious, direct contact being necessary to communicate it. Every case
should be isolated for a period of three weeks from the beginning of the
disease.

The seat of the affection is the parotid gland which is located in front
of and on a level with the ear. One or both glands may be affected at
the same time or one may follow the other in succumbing. The duration of
the disease from the time the swelling becomes noticeable is about ten
days. It is contagious for a week after the swelling subsides. The
period of incubation is from one to three weeks.

Symptoms.--In the majority of cases the first symptom is the swelling
and the discomfort which it causes. In more severe cases the child feels
sick and is listless for from twenty-four to forty-eight hours. There
may be a headache, vomiting, pains in the back and limbs, and fever.
There is pain in the swelling which is increased by movement of the jaws
and by pressure. The degree of the swelling varies with the severity of
the attack. It may be very little or it may be so great as to completely
distort, and render unrecognizable, the face. It must be remembered
that, though mumps is not regarded as an important or dangerous disease,
it may assume dangerous characterist