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bility having been imparted even to vegetable existence. 

 Notwithstanding this distinction, however, the organic 

 sensibility is the principle, the element, so to speak, of 

 the sensibility of relation., and may be considered as its 

 first grade; so that, when it augments much in an organ, 

 it takes the character of the sensibility of relation, and 

 the organ now carries to the common centre certain im- 

 pressions, which before it either did not transmit, or 

 transmitted very imperfectly." 



Now, then, it maybe enquired, since even insects pos- 

 sess (for no living thing can want it) the organic sensibi- 

 lity, why may they not have, in accordance with this doc- 

 trine, the other sensibility the sensibility to external 

 hurts the sensibility of relation that animal sensibility, 

 concerning which we hesitate ? for the reason assigned 

 before, their organic deficiencies for, grant to insects 

 a nervous system capable, whether in a natural or an 

 exalted state, of transmitting impressions, yet, till the brain 

 can be shown to have any existence, it will be vain for the 

 roads to be open ; there is no metropolis to which all 

 these roads converge ; the existence of a brain, or com- 

 mon centre, being for sensation the ; sine qua non for an 

 impression may even be made on the external organ, and 

 no sensation result. It may aid the apprehension of a 

 difference between mere impressions upon the organs of 

 sense, and the same impressions carried into full sensa- 

 tion, that some of the organs of sense being double, the 

 mere impressions made on them must be also double; 

 whereas sensation, because the brain comes in, is always 

 single. In reading, the two eyes do not see two books ; 

 though the two nostrils convey two impressions, but one 

 smell is the result : nor do two ears disturb the unity of 

 the sense of hearing ; but if the mind, which is single, did 

 not come into play, we should see double objects, and hear 

 two prima Donnas every time we went to the Opera. 

 Though the arguments derived from examination of their 



