| Gravity cream | 12 ounces |
| Skimmed milk | 18 ounces |
| Limewater | 6 ounces |
| Barley water | 12 ounces |
| Milk sugar | 4 rounded tablespoonfuls |
“The barley water is made with two teaspoonfuls of barley flour in a pint of water. The total quantity of the mixture is 48 ounces. Gravity cream contains 16% fat. Twelve ounces of gravity cream in a 48-ounce mixture will give, therefore, 12/48 of 16% of fat, or 4% fat. Both gravity cream and skimmed milk contain 3.20% protein. There are 30 ounces of gravity cream and skimmed milk in the mixture; 30 ounces in a 48-ounce mixture will give 30/48 of 3.20% of protein, or 2.00% of protein. Both gravity cream and skimmed milk also contain 4.50% of sugar. Thirty ounces of gravity cream and skimmed milk in a 48-ounce mixture will therefore furnish 30/48 of 4½ which is the same as 30/48 of 9/2 or almost 3.00% of milk sugar. Four rounded tablespoonfuls of milk sugar are equal to two ounces. Two ounces of sugar in a 48-ounce mixture is equal to 2/48 of 100% or 4%. The total percentage of sugar is, therefore, 7%. Two teaspoonfuls of barley flour in a pint of water makes a 1.50% decoction of starch. Twelve ounces of barley water of this strength in a 48-ounce mixture will give 12/48 of 1.50% or about 0.35% starch. There are six ounces of limewater in the mixture and 30 ounces of gravity cream and skimmed milk. 6/30 of 100% is 20%. The limewater is, therefore, 20% of the milk and cream. The mixture thus contains 4% fat, 7% sugar, 2% protein, and 0.35% starch, while the limewater is in the proportion of 20% of the cream and milk.”
If, therefore, the nurse will follow out the plan suggested by Drs. Morse and Talbot, it should be a simple matter to change the percentage of any of the food constituents in any formula.
The following schemes for feeding well babies are included to facilitate the work in the home. A nurse may teach the mother the manner in which these schemes are used, keeping in mind that there can be no iron clad rule for feeding all babies. No nurse should recommend a formula without directions from a physician. And no formula should be changed without his permission.
The following milk formulas are used in the Nathan Straus Pasteurized Milk Laboratories of New York:
Formula No. 1.—Infants from 1st to 4th week, by A. R. Green.
24 ounces of mixture divided into 8 feedings of three ounces each, fed at intervals of 2½ hours:
¾ oz. 16% cream
3 oz. full milk
19 oz. water
1¼ oz. limewater
1½ oz. milk sugar
Formula No. 2.—Infants 1st to 3d month, by Dr. R. G. Freeman.
1½ oz. 16% cream
3 oz. full milk
13 oz. water
½ oz. limewater
1 oz. milk sugar