is a remarkable fact, that until the weight of 7 lbs the female
infants exceeded the males in number, the latter thenceforward
predominating.

From these statements, and those of various other authors here quoted,
the conclusion may be drawn that the normal weight of a mature new
born infant is not less than six nor more than 8 lbs., the average
weight being 6 1/2 or 7 lbs., the smaller number referring to female and
the higher to male infants."] small and delicate, but who slept the
greatest part of their time, become strong and healthy. On the other
hand, I have known those who were born large and strong, yet who slept
but little, become weak and unhealthy.

The common practice of a nurse allowing a baby to sleep upon her lap
is a bad one, and ought never to be countenanced. He sleeps cooler,
more comfortably, and soundly in his crib.

The younger an infant is the more he generally sleeps, so that during
the early months he is seldom awake, and then only to take the breast.

84. _How is it that much sleep causes a young child to thrive so
well_?

If there be pain in any part of the body, or if any of the functions
be not properly performed, he sleeps but little. On the contrary, if
there be exemption from pain, and if there be a due performance of all
the functions, he sleeps a great deal, and thus the body becomes
refreshed and invigorated.

85. _As much sleep is of such advantage, if an infant sleep but