is only developed muscle; carbon,--or sugar and fat, which represent
carbon,--for the whole wonderful course of respiration and circulation.
Water, too, must be in abundance to fill the tiny stomach, which in the
beginning can hold but a spoonful; and to float the blood-corpuscles
through the winding channels whose mysteries, even now, no man has fully
penetrated. Caseine, which is the solid, nourishing, cheesy part of milk,
and abounds in nitrogen, is also needed; and all the salts and alkalies
that we have found to be necessary in forming perfect blood. Let us see if
milk will meet these wants.


COMPOSITION OF COW'S MILK.

(_Supposed to contain 1,000 parts._)

Water 870.2
Caseine 44.8
Butter 31.3
Sugar 47.7
------
_Carried forward_ 994.0

_Brought forward_ 994.0

Soda }
Chloride of sodium and potassium}
Phosphate of soda and potassa }
Phosphate of lime } 6.0
Magnesia }
Iron }