AMONG THE GREEKS 85 



ascending vapor must be cooled and cooling it 

 must descend as water. But Jupiter rains not 

 that corn may be increased, but from necessity. 

 Similarly, if some one's corn is destroyed by rain, 

 it does not rain for this purpose, but as an acci- 

 dental circumstance. It does not appear to be 

 from fortune or chance that it frequently rains in 

 winter, but from necessity (law). 



[Adaptive Structures 7iot Produced by Sur- 

 vivals of the Fittest^ 



What, then, hinders but that the parts in Na- 

 ture may also thus arise (namely, according to 

 law) ? For instance, that the teeth should arise 

 from necessity, the front teeth sharp and adapted 

 to divide the food, the grinders broad and 

 adapted to breaking the food into pieces. [An- 

 other explanation may he offered.'] It may be 

 said that they were not made for this purpose 

 {i, e, for this adaptation), but that this (adap- 

 tative) purposive arrangement came about by 

 chance; and the same reasoning is applied to 

 other parts of the body in which subsistence for 

 some purpose is apparent. And it is argued that 

 where all thvngs happened as if they were made 

 for some jmrpose, being aptly (adaptively) 

 united by chance, these were preserved, but such 

 as were not aptly (adaptively) made, these were 



