Much information has been gathered since the study of the stomach was begun with the Roentgen ray in conjunction with bismuth. In the adult the size, position, shape, function and presence of tumors may be ascertained with a great amount of accuracy. In the baby, however, the conclusions arrived at in the study of the adult stomach are of limited value. Some work has been done, but much more is yet to be done before the information obtainable by means of the Roentgen ray in the study of the baby's stomach will be had.
The Roentgen ray has revealed to us the erroneous impressions we have entertained, more especially regarding the position, size, shape and function of the baby's stomach. Further studies will show, among other things, the influence of the quantity, quality and composition (including the elements and reaction) of the food given on the function of the baby's