INTRODUCTION. 403 



which is indicated by the common Greek word 

 Bios, Life. Both, too, stand in relation to 

 the Biscosmos, of which we are treating. It 

 is true that Biology deals more with the phys- 

 ical processes of Nature, while Biography re- 

 cords rather the mental or psychical side of 

 the individual as shown in the occurrences 

 of his career. In a sense we can say that the 

 plant or animal has a Biography which gives 

 an account of its birth, development and ces- 

 sation. It would be interesting to have the 

 Biography of a tree like the gigantic Sequoia. 

 Pedigrees of famous steeds have a biographi- 

 cal value to the horse-breeder. But it is the 

 life of the biologist which specially concerns 

 us here, and is intimately intertwined with 

 his science, each reacting upon the other, so 

 that they become mutually interpretative. The 

 mind or consciousness of the biologist turns 

 biological, being trained by what it works in, 

 and it gets to looking at the universe biologi- 

 cally, that is, after the method and within 

 the limits of Biology. Such an Ego accord- 

 ingly belongs to the full sweep of the Biocos- 

 mos ; indeed, a line of such Egos appears, un- 

 folding in historic succession, and setting forth 

 the various stages of their evolving science. 

 Thus we catch the outlines of the historical 

 Biocosmos, which will arise only after a con- 

 siderable evolution on which we can look back. 



