Careful study of artificial feeding must be made in two classes of patients; 1, infants whose mother's milk does not agree; and 2, whose mothers are unable to nurse them. Some of these cases may be supplied by a wet nurse and perhaps everything pass along satisfactorily; but so much trouble is sometimes experienced with wet nurses and so much success attends artificial feeding by means of cow's milk, that many physicians today have almost entirely abandoned the wet-nurse method of feeding babies, especially in view of the fact that it is often difficult to secure a wet nurse whose constitutional history is entirely satisfactory.
In every case it is necessary to determine the cause of disturbance. Not until this is done is the physician in a position to permit or advise the adoption of an artificial diet. The most common cause of digestive derangements in infants is some fault