Congenital atresia of the esophagus is everywhere considered one of the rare anomalies. Sir Morell Mackenzie1 (1884), after an exhaustive search could collect only sixty-two cases from the literature, and added only one of his own. Shukowsky,2 with a hospital experience of 50,000 new-born babies, saw only one case. And yet within a period of one year three of these cases came under my observation, and I have knowledge of at least one other within the following year.3 Even more striking was Hirschsprung's4 experience, who, in 1861, in Copenhagen, with only 180,000 inhabitants, saw four of these cases within a period of seven months. Although such grouping is a matter of chance, yet one cannot help but wonder whether these cases are not more frequent than we have been led to think.
The cases here reported were all under exact observation in hospitals, and in each