The study of the stomach from radiographs, taken at frequent intervals after the introduction of bismuth in the regular feeding, offers a new and interesting method of observing gastric motility in infants. It is a subject which has a very important bearing on many of the questions which arise in connection with infant feeding, but we have at present very little accurate knowledge either of normal or abnormal motility in the gastric digestion of infants, as shown by this method of investigation.
The prevailing view expressed in text-books is that the infant's stomach empties itself in about two hours in breast-fed babies, and in three hours in artificially-fed babies. This opinion has been based on the results of the examination of the stomach contents obtained by siphonage.
Dr. Walter B. Cannon of Harvard was one of the first to study in animals gastric motility by means of the fluoroscope. With