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thera. Now, as we reason and think on 

 all the subjects of our knowledge, it is 

 evident that whatever performs these acts 

 must have communication with all parts of 

 the brain. 



The eye cannot judge of sensations pro- 

 duced by the ear, nor the ear of those of 

 smell, taste, and touch, yet we decide on 

 all our sensations, faculties, and sentiments ; 

 consequently, whatever exercises this power 

 must be acted upon by all parts of the 

 brain. 



The vital actions in the brain recur spon- 

 taneously, and promiscuously in sleep, as 

 has been said, so as to create images, and 

 excite imaginations, feelings, and thoughts. 

 They can also be renewed by volition. We 

 may endeavour to retrace the objects we 

 have seen, till their spectra arise to our 

 view ; or meditate on music we have heard, 



F 3 



