Although the advances in roentgenology of the internal organs during the past few years have been truly remarkable, developing it into a highly specialized division of medical science, comparatively little research work has been done in the department of pediatrics. This was apparently not due to lack of inclination, but to the natural limitations imposed by a technic not sufficiently developed to make extended work with infants and young children possible.
The long exposures formerly necessary made it impractical to get radiographs of unruly infants with any detail, and, furthermore, there was always the danger of injury. Anesthesia was therefore often necessary when dealing with these young infants.
Flesh and Pietri in 1911 did pioneer work in this direction when they attempted to determine the normal stomach of nurslings and children, using bismuth or barium in their feedings. Their findings are mainly based on the results of fluoroscopic examination. Although