886 
GENETIC AND BIOLOGICAL EFFECTS OF RADIATION 
Dr. Brown : To what do I contribute the dif- 
ference in RBE for swine with respect to man? 
I have no answer for that. As far as I know, 
there has been no logical reason why neutrons 
are less effective in large animals than in small 
animals. This was discussed in a neutron sym- 
posium approximately two years ago at Oak 
Ridge, 
