One seats oneself at the side of the bed, and if the child is asleep so much the better. Slipping the warm hand under the bedclothes, one lays it on the abdomen of the child, and waits. Quite often without doing anything else the tumour will be felt to harden, and the diagnosis is made then and there. If no peristalsis is felt, slight movements should be made with the fingers to induce it, when it can at once be felt.