EXTENSION OF LAWS TO ADJACENT CASES. 95 



respect to the probability of counteracting causes, it 

 has been seen that this calls for a greater abatement 

 of confidence, in proportion to our ignorance of the 

 causes on which the phenomena depend. On both 

 accounts, therefore, a derivative law which we know 

 how to resolve, is susceptible of a greater extension 

 to cases adjacent in place, than a merely empirical 

 law. 



