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The cases reported have been seen in private practice during the past eight years. Cases seen in consultation with other physicians have not been included. The history diagnosis was based on definite periodic attacks of vomiting, for which condition the patient was brought to me. Recurrent vomiting, in a vast majority of the cases, we found occurs in the offspring of those who for two or more generations have not been occupied with manual work. The recurrent vomiting patients are the offspring of those who have had business or professional occupation. SUMMARY OF THE FEATURES OF CASES SEEN Average time cases were followed was 104 weeks. Sex: Seventy were boys; seventy-one were girls. Family History: Rheumatism in one or both parents in forty; sick headache and bilious attacks in forty. Appetite: In 31 per cent, was normal; in 69 per cent, it was indifferent; in 59.5 per cent. there was constipation. Previous Feeding in 120 Cases: Twenty-one patients were nursed by mother nine months ; forty were nursed by mother six months ; four cases had been wet-nursed; sixty-nine had been difficult feeders on cow's milk and had been given the usual trial of foods. Recurrent colds had been present in 41 per cent. This information was 3 to 6 months, 40. Duration and Severity of Seizures : The severity of the attacks varied widely; in some the child would vomit but two or three times. These usually represented the short-interval cases. In others the vomiting was protracted and severe. The average was three and one-half days. The longest seizure under observation continued thirteen days. Read at the annual meeting of the American Pediatric Society, Stock\x=req-\ bridge, Mass., May 28, 1914.

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