HISTORY OF THE ATOMIC THEORY. 141 



said that we cannot find the affinity of a compound from 

 knowing that of its parts, it refers to affinity dynamically ; 

 no hint is given as to the knowledge of this amount 

 quantitatively. Proportion generally may be said to be 

 excluded. 



Although these opinions give a pretty fair idea of the state 

 of the chemical mind at the several dates, we must return to 

 an earlier date again to follow up another direction. 



