265 



entirely reflect it ; and all the intermediate 

 shades and colours, are the various degrees 

 in which it is partially absorbed or im- 

 peded : smoothness, or harmony of sur- 

 face, is to the touch, what harmony of 

 colour is to the eye ; and as the eye has 

 learnt by habit to perceive form, as in^ 

 stantaneously as colour, we perpetually 

 apply terms belonging to the sense of touch, 

 to objects of sight ; and while they relate 

 only to perception, we are guilty of no im- 

 propriety in so doing ; but we should not 

 forget that perception, and sensation, are 

 quite different: the one being an operation 

 of the mind, the other an impression on 

 the organs ; and that therefore, when we 

 speak of the pleasures and pains of each, 

 we ought to keep them quite separate, as 

 belonging to different classes, and govern- 

 ed by different laws/' 



66 There can be no doubt," said Mr. 

 Seymour, " of the distinction between per- 

 ception and sensation ; but in speaking of 

 visible objects, I can hardly admit that 

 they are quite different, or that they ought 



