404 THE BIOC08MOS HISTORICAL. 



Here then the pivotal thought comes up that 

 we have reached not merely Evolution, but 

 the Evolution of Evolution, as it turns round 

 upon itself and applies itself to itself. The 

 biologist evolves his science, but now we are 

 to evolve the biologist evolving his science, 

 and behold him subject to his principle, illus- 

 trating in his own individual life his evolu- 

 tion of life in Nature. Nor is this all : there 

 are many individual lives of biologists success- 

 sive in time, who show the Evolution of their 

 science as a whole from its beginning till the 

 present time. 



Evidently we have before us three phases 

 of the evolutionary principle : First is the 

 Evolution of biology (the science), then is 

 the Evolution of the single biologist (the biog- 

 raphy), third is the Evolution of the many 

 biologists with their doctrines (the history). 

 The great scientist thinks with Nature, or by 

 means of Nature, to whom he has to give a 

 human voice, which she strictly has not, yet 

 longs for. But Nature is large, has many 

 compartments, each with its own character, or 

 soul or Psyche. The scientist usually special- 

 izes, confining himself to one of these compart- 

 ments, with whose Psyche he affiliates on the 

 most intimate terms, seeking by many sorts of. 

 interviews to get acquainted with it and to ex- 

 press it. Newton was a cosmical genius, who 



