are using formula
five of the first series; that is, six ounces of the ten per cent milk in
twenty ounces of milk, increase the fat slowly, for the proportion of fat
(three per cent), is near the limit for healthy children.

How then shall I strengthen the milk? By raising the percentage of
proteids (curds, skim-milk).

How can I do this? Use the formulas derived from the seven per cent milk
and discontinue the ten per cent milk.

THIRD SERIES.--Five formulas for seven per cent milk for the later months--
Formulas. 1 2 3 4 5
7 per cent milk 7 oz. 8 oz. 9 oz. 10 oz. 11 oz.
*Milk Sugar 1 oz. 1 oz. 1 oz. 3/4 oz. 1/2 oz.
Lime-water 1 oz. 1 oz. 1 oz. 1 oz. 1 oz.
Boiled water 12 oz. 11 oz. 10 oz. 4 oz. 3 oz.
Barley Gruel 0 oz. 0 oz. 0 oz. 5 oz. 5 oz.
----- ----- ----- ----- -----
20 oz. 20 oz. 20 oz. 20 oz. 20 oz.

*(As the milk sugar is dissolved in the boiled water the quantity is
twenty ounces instead of twenty-one.) Oatmeal gruel can be substituted for
barley gruel if there is constipation. To increase the food to
twenty-five, thirty, or thirty-five ounces increase the milk ingredients
by 1/4, 1/2, 3/4 and for forty ounces using two times as much.

How shall I increase the food during this period? Beginning with formula
one of this series, which should usually follow five of the first or
second series, you can usually make the increase in ten days to No. 2; in
two weeks you can use No. 3; but proceed more slowly to four or five when
you have reached them. The same formula may be continued sometimes for
three or four months with no other change, except an increase in the
quantity of the food, that is from twenty ounces to twenty-five, etc.

Is it necessary or important to reduce the proportion of fat as it is at
first, reduced in passing from formula five of the first series to formula
one of the third series? It is not necessary.

How much is this reduction? From 3 to 2.50 per cent.

How much increase of fat is there from the fifth formula of the second
series to the first formula of the third series? From 2.00 to 2.50 per
cent.

Can the first decrease be avoided? Yes, by taking off at first the upper
thirteen ounces as top-milk, and using in a twenty-ounce mixture seven
ounc