Xll APOLOGIA 



trons, planets, nebulse, and suns, is a perennial joy and con- 

 solation. We should all be happier if we were less com- 

 pletely obsessed by problems and somewhat more accessible 

 to the esthetic and emotional appeal of our materials, and 

 it is doubtful whether, in the end, the growth of biological 

 science would be appreciably retarded. It quite saddens me 

 to think that when I cross the Styx, I may find myself 

 among so many professional biologists, condemned to keep 

 on trying to solve problems, and that Pluto, or whoever is 

 in charge there now, may condemn me to sit forever try- 

 ing to identify specimens from my own specific and generic 

 diagnoses, while the amateur entomologists, who have not 

 been damned professors, are permitted to roam at will 

 among the fragrant asphodels of the Elysian meadows, net- 

 ting gorgeous, ghostly butterflies until the end of time." 



DIVISIONS OF HALF MILE DOWN 



I. EMOTIONAL {Chapter i) 



n. HISTORICAL (Chapiers ii-iii) 



III. PRAGMATIC (Chapters iv-xi) 



IV. TECHNICAL (Appendices) 



