AS COMPARED WITH THAT OF OTHER VENOMOUS SNAKES. 125 



4.45. It becomes more languid. 



4.48. Circulation has ceased, but yet there is no marked 

 extravasation. 



Experiment XVII. 



Another portion of the same mesentery had cobra-poison 

 applied, but after half an hour there was no sign of extravasation. 



Experiment XVIII. 



A fresh piece of mesentery exposed of same cat, and diluted 

 Crotalus-ipoison applied at 4.52 p.m. 



The circulation was rather languid at the time, and apparently 

 became more languid. 



At 4.58 no extravasation had taken place, the blood flowing 

 very languidly. 



5.15. Circulation still going on, but very slowly; no extrava- 

 sation : it soon after ceased. 



Experiment XIX. 



At 5.2Q p.m. a fresh portion of the mesentery was exposed ; 

 to one part cobra- and to the other Crotalus-'poison was applied, 

 and the effect was watched with the naked eye. 



5.45. No extravasation visible. 



At 6.15 p.m. slight extravasation equally visible on both. 



Experiment XX. 



August 25th, 1874. — At 2 p.m. a young cat was chloralised. 

 The mesentery was drawn out and a part treated with cobra- 

 poison, another part with Crotalus-'poison. 



At 5 P.M. On examination, that under the influence of the 

 Crotcdus-\)oisoii was found deeply congested and reddened with 

 blood, extra vasated in the course of the small vessels, forming a 

 well-marked redness to the naked eye. Under the microscope 

 the red corpuscles were seen in numbers outside the vessels. 

 Circulation still going on vigorously. That part treated with 

 cobra-poison was barely altered, but on close examination slight 

 patches of extravasation were seen in the course of the vessels. 



The difference was well marked between the two — the 



