344 REPORT OP" NATIONAL MUSEUM, 1893. 



The poisou of the poisonous su.akcs — Continiied. Page. 

 Preventive inoculation — Continued. 



Immunity of snakes against venom 475> 



Experiments of Phisalix and Bertrand 479 



Calmette's "serum" vaccine 480 



Extermination of poisonous snakes 481 



Decrease of poisonous snakes 481 



Local increase 481 



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



The question of bounty 482 



The result in France 482 



Bounty a failure 484 



List of illustrations 485 



