350 W. A. HAGAN 



3. Guinea-pig inoculation frequently fails because of the death 

 of the animals from a malignant oedema-like infection before any 

 anthrax organisms which may be present have time to develop. 



4. The chief difficulty in the way of a cultural diagnosis of 

 anthrax in these cases, the difficulty in distinguishing, rapidly, 

 between the true anthrax and the anthrax-like organisms has 

 been obviated by a method here given. 



EXPLANATION OF PLATE 1 



Fig. 1. Microscope, with Open Petri Dish in Place for Direct Examination 



of Colony 



Fig. 2. Anthrax Colony X 20 



The black line at one margin is extraneous matter which fell on the open plate 

 while it was being photographed. 



Fig. 3. Margin of Anthrax Colony X 100 



Fig. 4. Margin of Anthrax Colony X 600 



Fig. 5 Margin of an Anthrax-Like Colony X 600 



Fig. 6. Margin of an Anthrax-Like Colony X 600 



