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the progress of information on the nature and 

 mode of propagation of sound, brought into con- 

 nection with considerations on the organization 

 which renders animals susceptible of differences 

 of tone, and those combinations which produce 

 harmony, has made us aware that sound is pro- 

 pagated under circumstances which will render 

 what is very audible to one, scarcely, if at all so, 

 to others, even among men ; and it has been 

 still further rendered probable, that there exists 

 an infinite scale of sharp notes, which are per- 

 ceptible only to certain organizations, suitably 

 adapted for their reception. Thus, sounds may 

 be emitted from numerous tribes of living things, 

 the existence of which could not be detected by 

 our visual organs. Further, certain insects may 

 hear the song of their companions, or the watch- 

 word of their mates, and be insensible to the 

 calls of many other tribes ; while, on the other 

 hand, the incongruous sounds of the sunny green- 

 sward may be all resolved into harmony a har- 

 mony not intended for us among the choristers 

 themselves. Thus, in the song of insects, and 

 the developement of the sense of hearing, there 

 are analogies with our own enjoyments, which 

 lead us to deduce upon fair and rational grounds, 

 that they were intended for their happiness, and 

 the study of which assists us in marking the 

 goodness and the wisdom of the Creator. 



There has been considerable doubt as to the 

 exact position of the organ of hearing, as well as 

 of smell, in insects, and some have supposed 



