Siegmund J. Baum It has become a tradition to commence advocated by Leonard Cole) (3). important meetings of this society with At about the same time, Alpen and reminiscence and nostalgia. Bone marrow Baum (4), using a larger mammal, the dog, transplantation, which has a history of only demonstrated that injecting autologous marrow 30 to 40 years, permits this process, since post irradiation would protect lethally some of the early investigators are still with irradiated animals (see Table). Certainly, us. For example, over the past 15 years, we protection was obtained from the cellular have had three symposia in honor of Egon constituents of the bone marrow. Lorenz. As we all know, the team of Lorenz, We undertook to test on dogs the Uphoff and Congdon was involved in the first hypothesis of Gengozian and Makinodum (5) that successful transplantation of syngeneic and increasing the radiation dose will increase allogeneic bone marrow into irradiated immunologic tolerance for allogeneic implants.