132 THE INDUCTIONS OF BIOLOGY. 



on the other hand, we found it to follow from a certain rela 

 tive increase of expenditure that necessarily accompanies in 

 crease of bulk, and to be therefore an indirect corollary from 

 the persistence of force. Fourth, that among organisms 

 which are large expenders of force, the size ultimately at- 

 'ained is, other things equal, determined by the initial size : 

 in proof of which conclusion we have abundant facts, as vve'l 

 as the a priori necessity that the sum-totals of analogous 

 diminishing series, must depend upon the amounts of their 

 initial terms. Fifth, that where the likeness of other cir- 

 cumstances permits a comparison, the possible extent of 

 growth depends on the degree of organization : an inference 

 testified to by the larger forms among the various divisions 

 and sub-divisions of organisms; and inferable a priori from 

 the conditions of existence. 



