THE LAW OF EVOLUTION 



course of illustration — which would oblige us 

 to defer our main subject until another occasion 

 — we are now enabled to see how it is that or- 

 ganic bodies can practically solve the dynamic 

 paradox of acquiring a high degree of concen- 

 tration, even while retaining an immense amount 

 of motion. We are prepared to find, under 

 these quite peculiar conditions, the structural 

 rearrangements characteristic of Evolution car- 

 ried on to a great extent. And we need not be 

 surprised at finding these secondary phenomena 

 here displayed so conspicuously as to obscure 

 the significance of the primary phenomenon, 

 integration. It was, in fact, through the study 

 of organic phenomena by physiologists that a 

 formula .was first obtained for the most con- 

 spicuous features of Evolution ; while the less 

 obtrusive but more essential feature not only 

 remained unnoticed until Mr. Spencer discerned 

 it, but was not adequately treated even by him 

 previous to the publication of his rewritten 

 " First Principles," in 1867. I think it there- 

 fore advisable, in dealing with the law as gen- 

 eralized from organic phenomena, to begin by 

 describing these most conspicuous features. We 

 shall thus obtain a clearer view of the whole 

 subject than we could well obtain in any other 

 way. Having shown that Evolution is always 

 and primarily an integration of matter attended 

 by a dissipation of motion ; and having shown 

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