The subject of diverticulum formation in the appendix has apparently aroused the interest of but few writers in Europe and America. It seems rather astonishing in these days of experimental investigation of almost every conceivable subject that this interesting, if relatively unimportant, process has never, so far as I can ascertain, been produced or studied experimentally. Hypotheses have been based on morphologic observations of the appendix itself, together with the application to the appendix of a few experiments made in the large and small intestine. The results are unsatisfactory because some of them, reported by earlier observers, either could not be reproduced, or produced entirely different and contradictory results, when repeated by others.
It seems, therefore, that this condition deserves further investigation, particularly so inasmuch as I have become convinced during the past year that the condition is not nearly so infrequent as the few reported cases would lead one