the habits and intelligence of different animals is im- 



Man, from the nudity and the delicacy of the tex- 

 ture of his skin, derives* from this source, a discrimi- 

 nation and refinement* in_ regaid to the natme of 

 bodies, much superior to what many other 



The Sight enables us to distinguish 

 quantity, and the direction of the rays .of light which 

 proceed from a luminous body; or, in other words, to 



ever, of the latter we are exposed to great deception; 

 lor the lays of light, by Mling on a- minor, or any 

 other plane reflecting .surface* before they reach the 

 eye, will induce us to believe the body to be in that 

 direction. Bodies which are near, reflect more rays 

 of light than such as are distant: we thus estimate dis- 

 tance by the eye; but it happens continually, that 

 some bodies naturally reflect more rays than others; 

 in consequence of which a rery luminous body, at a 

 great distance, wffl frequently be thought to be much 

 nearer to us, than such as are more within our reach. 

 Mistakes of this kind can only be corrected by the 

 sense of touch, and our habitual reference to it, and 



us to fora 



tens the touch in die rapidity with which it 



in the extensiveness of its ap- 

 in a single moment. It is* therefore* an oigan 

 of the first utility in 1l * 3> fcg us acquainted with sp- 

 lounding objects. Man does not possess it to that 



ther see as far as the Tuhure or eagle, nor so minutely 

 as die fly; yet his ingenuity has t uiifc.d him to 

 both. Fur,withthetefaHpe,he 



