SUPPLEMENT VI 



Nobel Prize Lecture (1959) 

 of Arthur Kornberg 



Reprinted by permission of The Nobel Foundation for 

 Les Prix Nobel. Published in Science, 131 :i503-i5o8, 

 i960. 



Arthur Kornberg (191 8- ) 



SUPPLEMENT VII 



Nobel Prize Lecture (1959) 

 of Joshua Lederberg 



Reprinted by permission of The Nobel Foundation for 

 Les Prix Nobel. Published in Stanford Med. Bull., 

 ly. -120-132, 1959; and in Science, 131:269-276, i960. 



Joshua Lederberg (1925- 



