From this point the formula may be increased by adding 2 ounces of skimmed milk each month until the baby is eight months old. For each ounce of milk added, an equal amount of water should be omitted. The sugar in the formula should be reduced one half tbs. every three months. At six months the baby would be taking-- Cream 6 ounces Skimmed milk 14 ounces Boiled water 12 ounces Sugar of milk 3-1/2 level tbs. At eight months-- Cream 6 ounces Skimmed milk 18 ounces Boiled water 8 ounces Sugar of milk 3 level tbs. This amount will not be found sufficient in quantity for a twenty-four-hour mixture for children of this age. Increasing the amount of the last formula in the same proportion, it will be-- Cream 9 ounces Skimmed milk 27 ounces Boiled water 12 ounces Sugar of milk 4-1/2 level tbs. At this age the formula usually may be changed so as to be made from whole milk instead of cream and skimmed milk. The formula may be made as follows: Whole milk 36 ounces Boiled water 12 ounces Sugar of milk 4-1/2 level tbs. From this point on the formula may be increased by replacing the boiled water with whole milk, two ounces each month up to thirteen months. At this age the boiled water may be omitted from the formula one ounce each week. Beginning at the age of eight months the sugar may be eliminated from the formula, one tablespoonful each month. _Barley Water._--At the age of five months, or at any time thereafter, barley water may be substituted for boiled water in the formula. This should be substituted when the baby is not gaining in weight. It may be substituted in many instances when the movements are not well digested. _Lime Water._--It is frequently found to be advisable to add lime water. It is not necessary in every instance, but should be given if the baby is inclined to spit up, or in cases where the stools are too frequent in number and are slightly green in color. * * * * * ~Determining the Fuel Value of a Formula.~--The computation of the fuel value of a formula is very essential since the growth and development of the infant depends largely upon whether or not its energy expenditures are well covered. The method is simple, requiring the same methods used in the computing of other dietaries. Take the formula just calculated, its fuel value would be estimated as follows: Thirty-two ounces are equal to 960 grams. In each 100 grams there would be 3 grams of fat, 2 grams of protein and 6 grains of sugar. Hence in 9.6 one-hundred-calorie portions there would be 9.6 x 3--28.8 grams of fat, 9.6 x 2--19.2 grams of protein, and 9.6 x 6--57.6 grams of sugar, in a thirty-two-ounce mixture.