OF NATURAL HISTORY. 189 



2. Of Hearing alone. 



The pleafures of the ear arife chiefly from the fucceflion of founds 

 conformably to the rules of melody or of harmony. Hence our fta- 

 tue's defires would not be confined to a fingle found; he would wifti 

 to become a complete air. Sounds produce greater emotions than 

 odours. They excite joy orfadnefs independently of acquired ideas. 

 Noife alone, without mufical exprefTion, would be agreeable : And 

 mufic would convey pleafure proportioned to the exercife of the 

 ear. Simple, and even coarfe fongs, would at firfl: be ravifliing. 

 But, when gradually accuftomed to mufic more compounded, the 

 ear would difcover new fources of delight. The pleafure of a fuc- 

 ceflion of mufical tones being fuperior to that of a continued noife,, 

 he would not confound the one' with the other. 



3. Smelling and Hearing united. 



As thefe fenfes, taken feparacely, give to our ftatue no idea of e.Y- 

 ternal objeils, neither can they by their union. He would never 

 fufped that he had two different organs of perception, nor, at firflr, 

 diftinguifli two modes of exiflience in himfelf. Sounds and odours 

 would be confounded, and feem to be only one fimple modification. 

 He would learn, however, by experience, and the aid of memory, 

 to diftinguifh two fenfations ; and then he would think that his ex- 

 ifl:ence was double. His train of ideas is more varied and extenfive, 

 becaufe he has two kinds of mollification ; and, perhaps, noife would 

 feem fo different from harmonious founds, that he might imagine he 

 had three fenfes. 



4. Tttjle 



