. F. After three
months the temperature may go as low as 55 deg. F. After the first year it
may be 50 deg. or even 45 deg. F.

_At what age may the window be left open at night?_

Usually after the third month, except when the outside temperature is
below freezing point.

_How often should the nursery be aired?_

At least twice a day--in the morning after the child's bath, and again
in the evening before the child is put to bed for the night. This
should be done thoroughly, and the child should be removed meanwhile
to another apartment. It is well to air the nursery whenever the child
is out of the room.

_What symptoms are seen in a child who is kept in too hot a room?_

It becomes pale, loses appetite, shows symptoms of indigestion,
occasionally vomits, stops gaining in weight, perspires very much, and
takes cold easily because of this and also because of the great
difference between the indoor and outdoor temperatures. Its condition
may be such as to lead one to suspect very serious illness.

AIRING

_How early may airing indoors he commenced and how long may it be
continued?_

Airing in the room may be begun, even in cold weather, when the child
is one month old, at first for only fifteen minutes at a time. This
period may be gradually lengthened by ten or fifteen minutes each day
until it is four or five hours. This airing may be continued in almost
all kinds of weather.

_Is there not great danger of a young baby's taking cold when aired in
this manner?_

Not if the period is at first short and the baby accustomed to it
gradually. Instead of rendering the child liable to take cold, it is
the best means of preventing colds.

_How should such an airing be given?_

The child should be dressed with bonnet and light coat as if for the
street and placed in its crib or carriage which should stand a few
feet from the window All the windows are then thrown wide open, but
the doors closed to prevent draughts. Screens are unnecessary.

_At what age may a child go out of doors?_

In summer, when one week old; in spring and fall, usually at about one
month; in winter, when about three months old, on pleasant days, being
kept in, the sun and out of the wind.

_What are the best hours for airing out of doors?_

In summer and early autumn a child may be out almost any time between
seven in the morning and sunset; in winter and early spring, a young
child only between 10 or 11 A.M. and 3 P.M., although thi