The Transplantation of Human Carcinomatous Material into Lower Animals

Although many attempts have been made to inoculate successfully ,the lower animals with portions of tumors from human beings they 'have in the great majority of cases been without results. In some instances the observers have claimed that they have been successful }rot their statements are, as a rule, not convincing. Carl Lewin 1 discusses this question of transplantation at length and reviews the reports of those who have conducted such experiments. The following is a synopsis of the instances that he considers, separating them into two groups, according as the results of the transplantation were negative or apparently successful. The first to be given are the negative instances.