70 BACTERIOLOGICAL DIAGNOSIS. 
out. The gelatin is then immersed in waym water 
until it is melted and poured out into a Petri’s dish 
Fic. 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. 
Fic. 14.—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 
