MODIFIED MILK 173 
One of the things that has restricted the use of modi- 
fied milk in the past is the high price at which it has 
been sold. There is no urgent need of putting the 
milk in small bottles provided with cotton plugs as is 
practiced in some of the large modified milk laboratories. 
What is needed above all is to get good pure milk and 
to reduce the casein content to at least one-half. Next 
in importance is the reduction of the acidity. Reducing 
the amount of casein not only eliminates an unneces- 
sary tax upon the digestive system in disposing of a 
surplus of a certain food element, but makes the casein 
more digestible in that it cannot clot so readily. If, 
in addition to eliminating half the casein, the milk is 
rendered alkaline or nearly so, the tendency of the milk 
to clot in the stomach is practically eliminated. The 
amount of colic and suffering due to milk clotting in 
the infant’s stomach, is difficult to estimate, but it is 
undoubtedly considerable. 
Rations. Infants and children like young animals, 
require slightly changed rations with advancing age. 
Thus in some of the laboratories where milk is modi- 
fied on a large scale, the percentages vary as follows: 
Age of Child Fat, % Sugar, % Protein, % 
One week..........-.-25- 2.00 4.50 0.75 
Four weeks .............. 3.00 6.00 I.00 
Seven weeks............. 3-50 6.50 1.25 
Fourteen weeks.......... 3.50 6.50 1.25 
Twenty weeks............ 3 as 6.50 1.50 
Thirty weeks............. 4.00 6.50 1.75 
It is not practicable for the average milk dealer to 
furnish different grades of modified milk; what he must 
do is to strike an average composition. 
