SUPPLEMENT VII 



Nobel Prize Lecture (1958) 

 of Edward Lawrie Tatum 



Reprinted by permission of The Nobel Foundation 

 for Les Prix Nobel. Published in Science, 129: 

 1711-1715, 1959. 



Edward Lawrie Tatum (1909- 



SUPPLEMENT VIM 



Nobel Prize Lecture (1958) 

 of Joshua Lederberg 



Reprinted by permission of The Nobel Foundation 

 for Les Prix Nobel. Published in Stanford Med. 

 Bull., 17:120-132, 1959; and in Science, 131:269- 

 276, 1960. 



Joshua Lederberg (1925- 



