THE LAW OF EVOLUTION 



are borne hither and thither by the vibrations 

 of cilia, it becomes evident that the formula 

 which expresses the structural evolution of 

 matter expresses also the functional evolution 

 of the motion which the integrating matter 

 retains. 



Embracing now in one general view the va- 

 rious kinds of transformation exemplified in 

 the present chapter, we find that our survey of 

 organic development completely justifies Mr. 

 Spencer's technical statement, — " Evolution is 

 an integration of matter and concomitant dissipa- 

 tion of motion, during which the matter passes 

 from an indefinite, incoherent homogeneity to a 

 definite, coherent heterogeneity ; and during which 

 the retained motion undergoes a parallel transfor- 

 mation." ' 



Here, it will be observed, we have obtained 

 a formula which applies not to organic devel- 

 opment merely, but to the transformations of 

 Matter and Motion in general. Though we 

 have been led to it solely bv the consideration 

 of those organic phenomena which, for reasons 

 already presented, most conspicuously exem- 

 plify it, and in connection with which it was first 

 partially generalized by Goethe and Von Baer ; 

 yet now that we have arrived at this formula, 

 we find ourselves expressing it in terms that are 

 universal. Instead of a mere law of biology, 

 1 First Principles, p. 396. 

 tol. n. 24I 



