Ethylene gas for anesthesia was advocated early in 1923 by Luckhardt of the University of Chicago. The Presbyterian Hospital in Chicago then began to use it. Good results were reported. Thus far ethylene has been used principally to anesthetize adults and children. No report of its use for infants has been found in the literature. The four cases presented here constitute a preliminary report on ethylene-oxygen as an anesthetic for infants. The only noteworthy difference in these charts is the respiratory curve. These notes are additional to the charts, which are otherwise self-explanatory.
—A boy, aged 4 weeks, weighing 4 pounds, 12½ ounces (2.2 kg.), was in a critical condition. He had lost a large percentage of his best weight, and was emaciated, weak and blue. A diagnosis of pyloric obstruction was made. The pediatric surgeon, who operated in all four of these cases, left the choice of