THE J-RNOM AriWRATUS 



437 



Having- in this way formed a standard minimum lethal dose of 

 cobra venom for man, viz., 15 mgm., they carried out experiments on 

 monkeys, using the first figure as a control, giving the desiccated 



Feeding a poisonous snake, first stage. 



Feeding a poisonous snake, second stage. 

 » 



venom subcutaneously. On this basis tiie minimum lethal dose for 

 other reptiles was : — 



Common cobra, 15 | Bungarus Candidas, i 

 Naja tripudians, 15 ,. fasciatus, 10 



„ bungarus, 12 \'iper russelli, 42 



Echis carinatus, 5 

 Lachesisgramineus, probably 

 more than any one snake 



could slied at anv one time. 



They then estimated how much venom several species of snakes 

 could inject at one bite. This they estimated by obtaining the venom 

 28 



