. Diseases of children. 51G. loi.—Cremometer: The instrument is filled to the mark o with unskimmedmilk and allowed to stand for from eighteen to twenty-four hours at the temperature of theroom, when the depth of the layer of yellow cream can be read off in degrees. The num-ber of degrees corresponds to the cream percentage, which in good milk should never fallbelow 10 per cent, (after Chevalier). of high specific gravity and very rich in proteids andmineral salts. Composition of Womans Milk.—Proteids are usually,present in proportion of one to two per cent. The amountof proteid is larger in t
. Diseases of children. 51G. loi.—Cremometer: The instrument is filled to the mark o with unskimmedmilk and allowed to stand for from eighteen to twenty-four hours at the temperature of theroom, when the depth of the layer of yellow cream can be read off in degrees. The num-ber of degrees corresponds to the cream percentage, which in good milk should never fallbelow 10 per cent, (after Chevalier). of high specific gravity and very rich in proteids andmineral salts. Composition of Womans Milk.—Proteids are usually,present in proportion of one to two per cent. The amountof proteid is larger in the first few days; after the thirdweek it is stationary to the end of lactation, when it?falls very markedly. Fat: 4 per cent, is the average. INFANT FEEDING 361 Sugar : The ordinary variations are between 6 per cent,and 7 per s • ^^^^wFiiW?yiiiffiiBHI CO 2 ! i 1 ^^ |3 ^^^^^^^^^^^^i 4-0 ^4 ?H 0,7% 4-3 Fig. 102. -Scheme showing the composition of human and of cows milk: i, Proteid;2, fat; 3, carbohydrates; 4, salts (Frvihwald and Westcott). Salts : The average proportion is about 20 per cent,or about one-fourth that of cows milk. EXAMINATION OF MILK The quantity is determined by weighing the baby be-fore and after feeding. The average amount of milk takenat one feeding by a child is an ounce for each month ofits age until the eighth month. Reaction is obtained by means of litmus paper; specificgravity is obtained by means of a small hydrometer. Fats.—A cream gauge holding 10 cc. is filled to thezero mark, and allowed to stand for twenty-four hoursat the temperature of the room. Then read off the per-centage of cream. The ratio of cream to fat is, womans5 to 3. Cows, after eight to ten hours, 4 to i. The sugar and salts are constant. Proteids can only be approximately determined by thespecific gravity a
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