14 DEFINITIONS. SECT. II.*. 



and jnufcular fibres, which excites into action the 

 fenforial power termed irritation ; but alfo pleafurc 

 or pain, when they excite into action the fenforial 

 power termed fenfation ; and defire or averfion, 

 when they excite into action the power of volition ; 

 and laftly, the fibrous contractions which precede 

 affectation ; as is further explained in Sect, XII. 2. 

 i. 



SECT. 



