F. L. B., a farmer, aged 38, American, single, 5 feet 6 inches (167.6 cm.) tall, weighing 135 pounds (61 Kg.), entered St. Clare Hospital, June 1, 1930, complaining of cramplike pain in the abdomen beginning the day before. His health had always been good. He had measles at the age of 10, and in 1913 fractured the right tibia. This was repaired with a silver plate, which was still in place. He never drank, he smoked moderately, he had always lived in Montana and he never had gonorrhea or syphilis.
The day before admission he arose "feeling fine," had breakfast, finished milking, and went to the granary for a sack of chicken feed weighing 100 pounds. He had the sack on his right shoulder, when a cramp began in his abdomen causing him to sit down. This pain settled gradually to his right side, continuing all next day. It