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Comments 



Davies: I wish to comment on acute irradiation. We have compared 

 somatic mutation rates at the V h y locus in Trifolium repens with dose 

 rates from 25 to 80,000 rads per hour, and find that we obtain about 

 10 times as many with the latter as the former. 



Lewis: If I understood the use of terms mutation yield and mutation 

 spectrum correctly, would you not finally be more interested in spectrum 



