lk; but if we begin with a very weak cow's milk the stomach
can be gradually trained to digest it. If we began with a strong milk
the digestion might be seriously upset.

_How rapidly can the food be increased in strength from Formula I to
II, from II to III, etc.?_

No absolute rule can be given. Usually we begin with I on the second
day; II on the fourth day; III at one week or ten days; but after that
make the increase more slowly. A large infant with a strong digestion
will bear a rather rapid increase and may be able to take V by the
time it is three or four weeks old. A child with a feeble digestion
must go much slower and may not reach V before it is three or four
months old.

It is important with all children that the increase in the food be
made very gradually. It may be best with many infants to increase the
milk by only half an ounce in twenty ounces of food, instead of one
ounce at a time as indicated in the tables. Thus from 3 ounces, the
increase would be to 31/2 ounces; from 4 ounces to 41/2 ounces, etc. At
least two or three days should be allowed between each increase in the
strength of the food.

_What general rule can be given for increasing the food?_

To increase when the infant is not satisfied but is digesting well.

_How does an infant show that he is not satisfied?_

He drains the bottle eagerly and cries when it is taken away. He often
forms the habit of sucking his fingers immediately after. He begins to
fret half an hour or an hour before the next feeding is due.

_In the series of formulas given in the table the quantities are
mentioned for making only twenty ounces of food. How should it be
prepared when more than this quantity is needed?_

It is equally convenient to make up 25 ounces, 30 ounces, 35 ounces,
or 40 ounces at a time.

To make--

25 ounces of any formula add one quarter more of each ingredient.
30 " " one half " "
35 " " three quarters " "
40 " " twice as much " "

Thus 25 ounces of Formula I would be obtained by using 21/2 ounces of
milk, 11/4 ounces of sugar and lime-water, 211/4 ounces of water; 30
ounces of the same would require 3 ounces milk, 11/2 ounces lime-water
and sugar, and 251/2 ounces water; 35 ounces would require 31/2 ounces
milk, 13/4 ounces lime-water and sugar, and 293/4 ounces water. The amount
of water need not be calculated