PHYSICAL AND LITERARY. 293 



conveyed with the blood, before it pro- 

 jduces jts effedis, I was naturally led to 

 iconfider, how far Medicines operated in 

 a fimilar way ; and I was the more en-r 

 couraged to attempt this fubjed, that 

 the difagreeraent to be met with among 

 the bed writers on it plainly proves they 

 are far from fufficiencly evincing the 

 truth of their opinions. 



Th e method purfued in the following 

 experiments, is, firll:, To obferve what 

 effedis each medicine, applied in various 

 •ways, can produce on an inii.e animal.* 



Next, a flop is put to the circulation 

 of the blood before applying the me- 

 dicine ; by which means we difcover, 

 how far its effecls on the intire animal 

 were owing to its adtion on thofe nerves 

 to which it was primarily applied. 



Last L Y, The nerves of fome particular* 

 part of the body are cut or deftroyed ; 

 afttr which, applying the medicine to that 

 part, we learn how far its eff^ds were ow- 

 ing to its abforption and mixture with 

 the blood' 



But, 



