OF NATURAL HISTORY. 201 



10. Of Sight united with all the other Setifes. 

 The eye conveys no idea of diftance, of magnitude, of 

 figure, or of lituation, without the affiftance of touching. 

 Either from chance, or from the pain occafioned by too ftrong 

 a light, the ftatue carries his hand to his eyes. The colours 

 of objects inftantly difappear. He removes his hand, and 

 the colours return. Hence he learns that colours are not 

 modes of his exiftence, but that they feem to be fomething 

 exifting in his eyes, in the fame manner as he feels at the 

 ends of his fingers the obje<fls he touches. 



The Abbe, in the fame ingenious manner, fhews hov/, by 

 experience and habit, by motion and touching, we acquire a 

 facility in corre(Sting the errors of vifion. But our iimit^ 

 permit us not to follow him an farther. 



