PLAN OF STUDY
Selection of Patients.—The 119 patients with pneumonia included in this study were admitted to the Children's Hospital of Philadelphia between Oct. 1, 1938 and May 1, 1939. In each case the diagnosis was made by the admitting officer and the patient assigned to either the control group or the group to be treated with sulfapyridine. Five infants considered moribund at the time of admission were placed in a separate group and treated with sulfapyridine. Of the remaining 114 patients, 58 were assigned to the group to receive treatment and 56 to the control group.Diagnosis.—The diagnosis was made in each instance by clinical examination. In 5 of the 114 cases in the compared series no roentgenograms were made, but the clinical observations were definite in each instance. No attempt has been made to separate lobar and bronchopneumonia, as in many cases a clinical diagnosis of