FIELD AND STUDY 



the determining factors in the evolution of species. 

 The early gigantic forms all disappeared, and lesser 

 forms finally came into possession of the earth. 



How the machinery for eating and fighting devel- 

 oped before the machinery for thought developed! 

 Behold the size of the under parts of the heads 

 of the mammals below us — all jaw and mouth. 

 When the cow or the horse pauses and looks at you, 

 — no, they do not look, they stare, — when the cow 

 or the horse pauses and stares at you in that blank 

 kind of way, one wonders what is passing in that 

 small cupful of brains at the top of their long, bony 

 heads. Not thought surely, yet some kind of molecu- 

 lar activity. Yet the bird has a much larger brain, 

 in proportion to its body, than has man, and the ant 

 much larger than the bird. Our yea-and-nay meth- 

 ods are inadequate to deal with nature. 



