220 L. F. LAMERTON 



ilbery: Perhaps this is a good time to think of chromosome changes in normal tissues 

 after radiation damage. Have you found evidence of increased cliromosome numbers in 

 normal tissues after radiation? 



LAMERTON: Well, we'vc done very little work on this. The only work we have done is to 

 look for more obvious changes such as micro-nuclei in bone-marrow cells of rats exposed 

 to contmuous irradiation for 100 days. 



