History.—Baby G., 3% months old, came under my care Oct. 6, 1916, with a history of recurrent attacks characterized by extreme cyanosis, dyspnea, and, judging from his hard crying, severe pain, the condition being relieved by a movement of the bowels or by the expulsion of gas, sometimes in large quantities.
His birth history was unimportant, and for two weeks he seemed a normal baby. The attacks were then first noted, and gradually increased in severity and frequency, until, of late, dyspnea had been more or less persistent, with several daily exacerbations of symptoms. The present attack had continued some forty-eight hours, with but little remission, and was the worst yet experienced.
Examination.—Examination showed a well developed, moderately wellnourished boy baby. He appeared practically moribund, being cold and cyanotic, and evidently suffering most extreme respiratory embarassment, there being violent recession of the lower chest wall at each