“…Furthermore, if we assume this extremely early specification of the respective epithelial elements of the stomach and intestine, how are we to explain the occurrence of glands of Brunner in the horse at a point seven meters from the pylorus, and the relatively great extent of the glands in the rabbit, sheep, pig, and man? It might, of course, be urged that it is possible that in the rapid growth of the midgut, gastric epithelial elements may be carried a considerable distance from the pylorus and there serve as foci for the development of glands of Brunner. A similar argument might be employed to explain the occurrence of characteristic intestinal epithelium in the stomach, as observed by Schaffer (1897), Boeckelman (1902), and Hari (1901). Such arguments are unanswerable because they do not admit of proof or disproof.…”