344 REPORT OF NATIONAL MUSEUM, 1893. 



The poison of the poisonous snakes — Continued. Page. 

 Preventive inoculation — Continued. 



Immunity of snakes against venom 479 



Experiments of Pliisalix and Bertraud 479 



Calniette's "serum" vaccine 480 



^Extermination of poisonous snakes 481 



Decrease of poisonons snakes 481 



Local increase 481 



Desirability of discrimination between poisonous and harmless snakes... 482 



Tlie question of bounty 482 



The resnlt in France 482 



Bounty a failure 484 



Tist of illustrations 485 



