130 THE PRINCIPLES OF SCIENCE. 



the connexion of cause and effect is one of direct pro- 

 portion. Bacon reminds us of the woman in ^Esop's 

 fable, who expected that her hen, with a double measure 

 of barley, would lay two eggs a day instead of one, 

 whereas it thereby grew fat, and ceased to lay any 

 eggs at all. 



