“…All investigators agree that total failure to excrete neutral red is diagnostic of gastric dysfunction and many (Lourja and Mirkin, 1925;Morrison, 1938;Gillman, 1944) that -partial suppression of dye excretion is an abnormal result preceding the final stage of total suppression. Whilst the present investigation is in the main in agreement with these observations, there is no doubt that patients with various disorders of the stomach and duodenum, including carcinoma and peptic ulcer, may have normal dye excretion.…”