| I. | II. | III. | IV. | V. | VI. | VII. | VIII. | |
| Plain milk | 5oz. | 6oz. | 7oz. | 8oz. | 9oz. | 10oz | 12oz. | 14oz. |
| Milk sugar | 1 oz. | 1 oz. | 1 oz. | 1 oz. | ¾ oz. | ¾ oz. | ½ oz. | ½ oz. |
| Lime-water. | 1 oz. | 1 oz. | 1 oz. | 1 oz. | 1 oz. | 1 oz. | 1 oz. | 1 oz. |
| Boiled water | 14 oz. | 13 oz. | 12 oz. | 7 oz. | 6 oz. | 5 oz. | 2 oz. | 0 oz. |
| Barley gruel | 0 oz. | 0 oz. | 0 oz. | 4 oz. | 4 oz. | 4 oz. | 5 oz. | 5 oz. |
| 20 oz. | 20 oz. | 20 oz. | 20 oz. | 20 oz. | 20 oz. | 20 oz. | 20 oz. |
When larger quantities than 20 ounces are required they are calculated in the same manner as described on page 73 in speaking of 10-per-cent milk.
The approximate composition of the formulas of the Fourth Series expressed in percentages is as follows:
| FORMULA. | Fat. | Sugar. | Proteids. |
| I. | 1.00 | 6.00 | 0.90 |
| II. | 1.20 | 6.00 | 1.00 |
| III. | 1.40 | 6.50 | 1.20 |
| IV. | 1.60 | 6.50 | 1.40 |
| V. | 1.80 | 6.00 | 1.60 |
| VI. | 2.00 | 6.00 | 1.80 |
| VII. | 2.40 | 5.50 | 2.10 |
| VIII. | 2.80 | 5.50 | 2.50 |
Why is it that an infant so often vomits some of its food within a few moments after finishing its bottle?
Usually because the quantity is too large. Sometimes it is due to the fact that the food is taken too rapidly, from too large a hole in the nipple. It may be due to too tight clothing, or to moving the child about in such a way as to press upon the stomach.
What are the principal causes of, and the changes in the food required by habitual vomiting, regurgitation, or spitting up of small quantities of food between feedings, often repeated many times a day?
This is always a symptom of gastric indigestion, and a most troublesome one. In such conditions the fat and often the sugar also should be reduced and the lime-water increased.
Formulas made from rich top-milk or milk and cream are to be avoided. Those made from 7-per-cent milk are less likely to be the cause of trouble than those from 10-per-cent milk; but if the symptoms are at all severe it is better to use instead of these the formulas of the Fourth Series derived from plain milk.
Reduction in the sugar may be made by adding only one half ounce of milk sugar to each twenty ounces of the food; in severe cases the sugar may be omitted altogether.