X-ray studies have been conducted to determine the emptying time of the normal stomach. Anything remaining in the stomach five hours after a test meal is abnormal. The stomach usually empties itself in 2 ½ to 4 hours. Series of tests have been run in which persons have been given routine breakfasts consisting of cereal and cream, bread, cooked fruit, and an egg. These stomachs were x-rayed and found to be emptied normally in less than 4 ½ hours.

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