PHYSICAL AND LITERARY. 527 



pulling away the inner coat of the oefo- 

 phagus. 



After much rcfledlion oji the proper- 

 eft ways of fixing the intended noofe, oc-» 

 cafioned by the almoft inaccellible litua- 

 tion of the polypus, 1 luckily contri- 

 ved the following inftruments, modelled 

 ontheringof Hildanus *, which anfwered 

 the purpofe effectually, I twifted five 

 fmall threads, and waxed them together, 

 with which I made the noofe, Tab. 7. Fig. 

 3. of the fame diameter with the circular 

 part of the inftrument A. Fig. i, I then 

 conveyed the ends of the thread through 

 the tubes marked B. and brought 

 them out at the lower apertures CC, pull* 

 ing them till the noofe was brought with- 

 in the ring of the inftrument, and entire- 

 ly concealed within the groove on the in- 

 ^de J this fecured the noofe from being 

 carried forward with the polypus 

 when paffing through the ring, which 

 would have prevented the intended ef- 

 fea. 



The 



* See Hildan. obferv. cent. 2. obf, zi. or^Heifter. 

 chirurg. tab, 21. fig, 6, 



