LA. Fat. Sugar. Proteids.
----------------------------------------
I. 2.50 6.50 1.25
II. 2.80 6.50 1.40
III. 3.15 7.00 1.55
IV. 3.50 6.00 1.75
V. 4.00 6.00 2.00
------------------------------------------

_How should the food be increased during this period?_

Beginning with I of this Series, which should usually follow V of the
First or Second Series (pages 70, 71), the increase may generally be
made in a week or ten days to II; in about two weeks more to III; now
more slowly to IV and V. When IV or V has been reached, the same
formula may sometimes be continued for three or four months with no
other change than an increase in the quantity.

_In passing from Formula V of the First Series to Formula I of the
Third Series the proportion of fat is at first reduced. Is this
necessary or important?_

No; it only happens to come so in simplifying the calculation. It may
be avoided by taking off at first the upper 13 ounces as top-milk and
using 7 ounces of this in a 20-ounce mixture, in place of Formula I;
and by using for the next increase the upper 15 ounces as top-milk,
taking of this 8 ounces in a 20-ounce mixture in place of Formula II.
Then should follow Formula III.

_What further addition may be made to the food of the later months?_

Usually about the sixth or seventh month, farinaceous food in the form
of gruel may be added, this taking the place of part of the water and
part of the sugar.

_What changes may be made in the food when the infant has reached the
age of ten or eleven months?_

The proteids may be still further increased, and the sugar and the
lime-water reduced until plain milk is given.

_How may this best be done?_

At first one feeding a day of plain milk and barley gruel may be
given; later, two feedings; then three feedings, etc. Let us suppose
an infant to be taking such a modified milk as Formula IV or V (page
76), six feedings a day. The plain milk diluted only with barley gruel
would at first replace one of these feedings; then two, three, four,
etc., these changes being made at intervals of about two weeks. The
proportions of the milk and barley gruel should at first be about
5-1/2 ounces milk, 2-1/2 ounces barley; later, 6 ounces milk, 3 ounces
barley; still later, 7 ounces milk, 2 ounces barley, until finally
plain milk is given to drink and the cereals given separately