Not all the mistakes here related are of my own making, for which I am duly thankful. But many of them or their results have come under my own observation. Others have been related to me by my colleagues.
The cases are, for the most part, not merely such as would in the adult present difficulties in diagnosis or in treatment; but they are such as are met only in the surgery of infancy and childhood, or in these periods of life present peculiarities when compared with corresponding conditions in the adult, and lead the practitioner unfamiliar with them into error.
I have taken especial pleasure in presenting the illustrative cases furnished by my colleagues, because they show that the idea that mistakes in the surgery of infancy and childhood are altogether too common is entertained not by myself alone; they show also that the condition of ignorance of children's