212 THE INDUCTIONS OP BIOLOGY. 



It follows obviously from this, that if structure progresses 

 from the homogeneous, indefinite, and incoherent, to the 

 heterogeneous, definite, and coherent, so too must function. 

 If the number of different parts in an aggregate must deter- 

 mine the number of differentiations produced in the energies 

 passing through it — if the distinctness of these parts from 

 one another, must involve distinctness in their reactions, and 

 therefore distinctness between the divisions of the differen- 

 tiated energy; there cannot but be a complete parallelism 

 between the development of structure and the development 

 of function. If structure advances from the simple and gene- 

 ral to the complex and special, function must do the same. 



