VITALITY OF PUTREFACTIVE OEaANISMS. 191 



here aimed at was that the liquid should be discharged 

 into the hulb far below the india-rubber connecting- 

 piece, and that during tlie discharge it should pass only 

 through filtered air. 



FlO. 19. 



Each bulb was exhausted in the manner already 

 described, and refilled three times in succession. When 

 last fiUed it was plunged for a minute or so into 



