3o8 ESSAYS and OBSERVATIONS 



(«) A folution of opium injefted into the 

 cavity of the abdomen or great guts of dogs, 

 does not deftroy the feeling and power of 

 motion of their hinder limbs, by fending 

 any effluvia to their mufcles ; otherways it 

 could not produce thefe effedls fo inftantane- 

 oufly, (N* 2 1, &; 22.) Befides, fince opiwn 

 thrown into the flomach and guts of a frog 

 after being deprived of its heart, deftroys 

 the fenfibility and moving power of its muf- 

 cles equally foon, as if the animal had been 

 intire (N° 2.) ; 'tis plain, that thefe ef- 

 feds cannot he owing to the finer parts of 

 the cpiufn being received into the blood, and 

 by its means carried to the feveral mufcles 

 ^nd organs. 



(0) Nor does a folution of opiiwt injedted 

 into the great guts or cavity of the ahdomeii 

 in dogs produce its effefts by tranfmitting 

 through the nerves any fubtile effiwcia to the 

 fpinal marrow ; otherways its operation could 

 not have been fo inftantaneous (N" 21. 

 & 22.) ; nor could the fpinal marrow and 

 its nerves have recovered their fundions fo 

 foon, after the cpium was evacuated by a 

 purgative clyfler, N° 21. 



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