58 EFFECTS OF 



pig. In 10 minutes afterwards the animal was 

 unable to walk ; then he became quite motionless, 

 except some slight occasional convulsions. He 

 gradually became insensible, the respirations 

 were laboured, and at the end of 14 minutes 

 from the application of the poison, the respiration 

 had entirely ceased, and he was apparently dead ; 

 but on opening the thorax, the heart was found 

 acting 70 times in a minute, circulating dark- 

 coloured blood, and it continued to contract 

 for several minutes afterwards. On dissection, 

 no preternatural appearances were observed in 

 the brain ; nor was there any other appearance 

 in the limb than would have arisen from an 

 ordinary wound. 



EXPEKIMENT XX. 



I made a wound in the side of a Guinea pig, 

 and introduced into it about two grains of the 

 woorara in powder. At the end of 25 minutes, 

 symptoms took place very similar to those which 

 occurred in the last experiment, and in 13 minutes 

 more the animal was apparently dead; but the 

 heart continued to contract 108 times in a minute, 

 and by means of artificial respiration the circu- 

 lation was kept up for more than 20 minutes. 



differ essentially from the Ticunas, which was employed in 

 the experiments of the Abbe Fontana. I am indebted to 

 Dr. E. N. Bancroft, who not only furnished me with some of 

 the Woorara which he had in his possession, but also lent me 

 his assistance in the experiments which were made with it. 



