[en] Data on ²²⁶Ra and calcium in samples of bone from 41 females who died from 1 to 53 years after exposure to radium have been subjected to preliminary analysis. The data for 86 samples from 26 femora show that there is a tendency for the ²²⁶Ra/Ca ratio (normalized to the terminal ²²⁶Ra body content) in any part of the femur to increase with time of death after exposure, but no progressive changes of distribution between cancellous bone (at the ends) and cortical bone (shaft) can be demonstrated. Direct comparisons are made between predictions of the ICRP model of alkaline earth metabolism and the data for compact bone (femoral shaft) and for cancellous bone (vertebra). Although the agreement is not good in either type of bone, the data provide some support for the model for samples from those cases in which the average absorbed dose to the skeleton was less than 10⁴ rad (100 Gy). There is some indication of an effect of radiation on the metabolism of radium in bone, but this conclusion is based on the assumption that the ICRP model provides a true description of the rate of loss of radium from the different types of bone