LETTERS TO BROTHER JOHN. 95 



of the secondary causes from which life results. 



Another law of contractility is, that it is in an 

 inverse ratio of sensibility. When contractility is 

 vigorous, sensibility is dull ; and when contractility 

 is deficient, sensibility is acute. This will be proved, 

 when speaking of the laws of sensibility. 



It will be as well, perhaps, here to caution you 

 against confounding the sensibility of science, which 

 signifies the property of feeling, or becoming sen- 

 sible of impressing stimuli, with that other kind of 

 young-lady sensibility which is, I believe, peculiar 

 to some boarding-schools. 



In my next Letter, I shall speak of certain laws 

 and characteristic facts peculiar to sensibility. Till 

 then, adieu ! 



E. JOHNSON. 



