PHYSICAL AND LITERARY. 335 



alone could be fuppofed to make any 

 communication of the nerves above with 

 thofe below^, and leaving nothing unhurt 

 but the large blood-veflels, and wrich 

 them probably the abforbent lymphatic 

 vefTels ♦. In a fifth frog, I cut all the 

 parts acrofs at the loyns, except the aorta, 

 and cava, with the lymphatics. I then 

 applied about 10: drops of the folutioni 

 on fcraped linen to the fkin of the hind 

 extremities of all thefe frogs ; and, in two 

 of them, I alfo poured lo drops of the folu-»- 

 tion under the fkin below the knee. After 

 an hour and a half, the two that had the 

 opium poured under the fkin of their legs 

 were violently convulfed, and, in little 

 more than two hours, were dead to outward 

 appearance. But the other two were not 



affedled 



* It will hardly, I imagine, be urged, that any 

 nerves which deferve attention might remain con- 

 nected to the coats of thofe veffels, and be propaga- 

 ted from the trunks to the fmall branches of the arte- 

 ries, and fo to the fkin, &c. ; as the arteries in large a- 

 nimals feem to be fupplicd, as they proceed, from the 

 nearefl: nerves ; and at any rate fuch nerves muft be 

 •»ery fmall.- 



