Читать книгу Study of Child Life - Marion Foster Washburne - Страница 8

Few children in America get as much sleep as they really need. Preyer gives the record of his own child, and the hours which this child found necessary for his sleep and growth may be taken for a standard. In the first month, sixteen, in full, out of twenty-four hours were spent in sleep. The sleep rarely lasted beyond two hours at a time. In the second month about the same amount was spent in sleep, which lasted from three to six hours at a time. In the sixth month, it lasted from six to eight hours at a time, and began to diminish to fifteen hours in the twenty-four. In the thirteenth month, fourteen hours' sleep daily; it the seventeenth, prolonged sleep began, ten hours without interruption; in the twentieth, prolonged sleep became habitual, and sleep in the day-time was reduced to two hours. In the third year, the night sleep lasted regularly from eleven to twelve hours, and sleep in the daytime was no longer required.