Kinds of Scientists 57 



disease may be traceable to the ability of certain cells in 

 the lymph nodes to alter their genetic code so as to direct 

 the manufacture of protein antibodies. Similarly, some 

 forms of cancer may be related to alteration of the code by 

 viruses, radiation, or chemical agents. 



The possibility of tracing all these varied and highly 

 significant phenomena back to a single molecular source 

 is as challenging as any of the new frontiers opened by 

 science in the past. It is no wonder that biology is now 

 beginning to attract many of our most vigorous and imagi- 

 native young minds. 



Notes 



* Alexander Pope, "Epitaph Intended for Sir Isaac Newton." 

 'Metaphysical Foundations of Modern Physical Science, New York, 

 Humanities Press, 1952. 



^M. Gell-Mann and E. P. Rosenbaum, "Elementary Particles," Scien- 

 tific American, 197 (1), 72-88, July, 1957. 



