After the first few months, a babe should be allowed and encouraged to sprawl; first on a wide bed, being watched that it does not fall off; afterwards on a carpeted floor, or a rug. This will spread its chest, and bring most of its muscles into play. Thus it will gain strength, and get ready, in due time (don't hurry it) to stand up and walk. Crawling comes first, according to the true nature of bodily development,

Infants Airing.

Very soon every baby ought to begin to be taken out in fine weather. In summer, no matter how soon; in winter, it requires care about keeping it warm, of course. But quite young infants may be, with proper out-of-door clothing, accustomed to being taken out into the sunshine and air every fine day.

A nusery ought to be always a sunny and well-aired room. As already said, infants suffer more harm from bad air than grown people do. Scarlet fever, measles, whooping-cough, diphtheria, and all other diseases are commonly worst, killing the most children, in tenement-houses; and, elsewhere, in crowded alleys, where people live too close together and do not have fresh, pure air to breathe.