The cause of this trouble is nursing mothers who have been living on food with an acid potentiality, to the neglect of fresh fruit and vegetables. This causes the milk to be deficient in the elements of the salts of soda. The milk is devitalized, lacking in vitamin or enzyme; and unless the child is taken from the mother's milk, and given the proper kind of milk and fruit juices, it will die. If the case is not very far advanced, by giving fruit and vegetable juices in conjunction with the mother's milk, and at the same time feeding the mother properly, it may not be necessary to wean the child.