PLATE X. 



Development of anthrax spores. Culture three days old ; cultivated 

 at 40 C. (104 F.) on meat-peptone-agar. Gentian-iodine. Zeiss T \. 

 O. 4. Magnified 2500 diam. 



a. Threads free from spores. 



b. Threads with beginning development of spores. 



c. Threads with perfect development of spores. 



