Opinions differ as to the best method of preparing the abdomen for radiographic examination, but there is at least one point upon which there is little disagreement, i.e., the most important prerequisite for a refined diagnosis is that the intestines be as clean as possible. As has been recently stressed (1), it is essential that the cecum as well as the sigmoid be well prepared for large bowel examination and that the intestinal mucosa throughout permits the adhesion of an even coating of barium to the intestinal wall. Any preparation should be essentially nontraumatic to the patient, inexpensive in terms of materials, time, and personnel, and should achieve consistently reliable results. Our experience is with a group of outpatients who come from a radius of up to three hundred miles to receive one or multiple examinations and then return home. We prefer a routine that offers minimal inconvenience to the patient before or after his visit to the department, but we must depend upon a system that will yiel...