280 THE SOLIDS. 



The general use of hair wherever encountered, it being a 

 non-conductor of caloric, is to preserve the warmth of the 

 system. 



Those situated at the entrance of the nares and meatus 

 auditorius externus are placed there to prevent the entrance 

 of foreign bodies, insects, &c. 



It is difficult to assign any use to the hairs of the axilla. 



It is very probable that hairs have other uses, and that 

 they exert some influence in regulating the electric condition 

 of the body. 



