Fig. 1.
Changes of body weight after transplantation of lethally irradiated BALB/c mice with 5 × 106 bone marrow cells and either 2.5 × 105 (Experiment I) or 4 × 105 (Experiment II) spleen MNL from naive (Experiment Ia and IIa) or tolerant (Experiment Ib and IIb) CBA mice. There were four mice in each group. (†): Death of transplanted BALB/c mouse.