MODIFTED MILK 83 



He calculated the bodily needs of the infant on the calorie 

 basis, and finds the following daily requirements per 

 kilogram (about 2.2 pounds) of body weight: First week 

 in hfe, 60 calories (i calorie being the amount of heat 

 required to raise i kilogram of water 1° C); first 3 months, 

 100 calories; second 3 months, 100 to 90 calories; third 

 and fourth 3 months, 80 calories per kilogram of body 

 weight per day. The maximum and minimum require- 

 ments being 100 to 70 calories respectively, when these 

 limits were overstepped unfavorable results ensued. 



In addition to the required heat units, the infants' food 

 must contain the proper proportion of the various classes 

 of nutrients — proteid, carbohydrates and fat, and min- 

 eral matter. The proper ratio of the different constituents 

 will vary, depending upon the following conditions: in- 

 dividuality, age, activity of the infant, amount of fresh 

 air received and other general conditions of living. 



Manner of Modifying Milk. — The milk prescribed 

 shall be of such quality and quantity (above-named con- 

 ditions considered) as to furnish the energy quotients re- 

 quired, and no more, and, at the same time, contain the 

 proper proportionate amount of each of the different food 

 nutrients. 



To calculate the number of calories in the modified 

 milk the following figures may be used: 



I gram of butter fat produces 9.3 calories. 



I gram of proteid produces 4.1 calories. 



I gram of carbohydrate produces 4.1 calories. 



To insure the proper proportionate amounts of the 

 different nutrients and make the modified milk resemble 

 in composition human milk, it is necessary to reduce the 

 amount of casein in cows' milk, increase the amount of 



