﻿INFANT FEEDING. 385 



a fat content lower than 38 per cent is used, then in order to give the 

 desired composition the cubic centimeters of cream must be increased to 



OQ . The number of cubic 



oo — 4 . . 



77=n — „ „ . . — 7: tt 7 X centimeters ot cream given 



( 1 he per cent oi fat in the cream used) — 4 , , . 



by the chart. 



and the cubic centimeters of milk diminished by the amount of the 



increase in the quantity of the cream. If a cream with a fat content 



higher than 38 per cent is used, then the cubic centimeters of cream 



must be diminished to 



_„ . The number of cubic 



77=; ; — „ . J . — -; ^ , X centimeters of cream given 



( Ihe per cent oi lat in the cream used) — 4 . ,, . 



by the chart. 



and the cubic centimeters of milk increased by the amount of the decrease 

 in the quantity of the cream. The proteid and sugar of all pure creams 

 have approximately constant values, so that for these the chart is always 

 applicable and no appreciable error is produced when the correction for 

 fat is made. 



Let us consider what the results of the above example would be were 

 a 27 per cent cream to be used instead one of 38 per cent. The per- 

 centage of fat in the former is lower than it is in the latter, therefore the 



cream required would be increased to == j X 7.5 or 11 cubic centi- 



£ I 4 



meters, an increase of 3.5 cubic centimeters over the quantity of 38 per 

 cent cream-. The milk would be diminished by 3.5 cubic centimeters or 

 reduced to 27.5 — 3.5 or 24 cubic centimeters. Hence, the desired 

 amounts of each ingredient to give a milk of the above composition when 

 a 27 per cent is used would be — 



Water cubic centimeters.... 65 



Milk do 24 



Cream do 11 



Sugar of milk grams.... 5.4 



If it is desired to add lime water (sodium citrate, etc.) then the water 

 content should be diminished by the number of cubic centimeters of lime 

 water (sodium citrate, etc.) to be added. If more than 100 cubic centi- 

 meters of the mixture is desired, multiply the quantities of water, milk, 

 cream, and sugar of milk respectively by as many times as the quantity 

 desired is greater than 100. 



