at the rate of a third, and to keep the balance the individual needs half a gram daily. A liter of milk contains one gram and twelve hundredths of a gram of calcium, so milk should be drunk in abundance.

Iron: during her pregnancy a woman needs a plentiful quantity of iron, to stock the liver of the fetus with this substance. For after birth the child feeds on his mother's milk, which is wanting in iron, so the infant depends on

the store of this mineral in his liver. Then, too, the woman loses a quantity of iron through the bleeding that comes with delivery, so she needs more to make good the loss. Iron is found in meat, spinach, and egg yolk.

Phosphorus: its importance equals that of calcium in the formation of the bones and the nervous system. What is taken daily in milk to supply the required quantity of calcium is sufficient to supply the

necessary quantity of phosphorus as well.

Iodine is found in fish, and in view of its importance to the pregnant woman she must not go without it, if only once a week.

Vitamins: the relation of the vitamins to the function of reproduction is still at the stage of laboratory study, but there are facts and observations which must be heeded, and we shall set them forth in detail in the coming issue.