Abstract
Estimation of the number of nucleated cells in the bone marrows of 41 young adult albino rats weighing around 200g gave a value of (1.81±0.05)×106 nucleated cells per mm3 of the fresh marrow. From this value, the total number of nucleated cells in the total bone marrow of the whole body was calculated to be (5, 840±161) ×106 on the assumption that the weight of the bone marrow was 1.65per cent of the body weight and its specific gravity 1.028.
