70 BACTERIOLOGICAL DIAGNOSIS. 



out. The gelatin is then immersed in warm water 

 until it is melted and poured out into a Petri's dish 



FIG. 13. Petri's Dish. 



(fig. 13) previously sterilised by dry heat and allowed 

 to cool. 



Both cultures are incubated at a temperature of 

 about 20 C. 



JT IG . I4< Stab culture of anthrax bacillus (Crookshank). 



In about two days the gelatin stab tube will show a 

 very characteristic appearance if the anthrax bacilli are 



