SUBSTANCES WHICH ACTIVATE COBRA VENOM. 465 



action on the ordinary species of blood only, if at all, when 200 or 

 600 times the amount is used which suffices for activating the cobra 

 venom. 



12. In the poisonous combination formed on the union of cobra 

 venom with lecithin the fatty-acid radical may, with a certain degree 

 of probability, be regarded as the active group. 



