PLATE VI. 
PATHOGENIC BACTERIA. 
Fig. 1.—Bacillus of influenza in bronchial mucus. x 1,000. Photo- 
micrograph by Frankel. 
Fig. 2.—Bacillus of influenza in bronchial mucus, after the termina- 
tion of the febrile period. The bacilli are for the most part in pus cells. 
x 1,000. Photomicrograph by Frankel. 
Fie. 3.—Bacillus tetani from an agar culture. x 1,000. Photo- 
micrograph by Frankel and Pfeiffer. 
Fic. 4.—Micrococcus pneumonize croupose in sputum of a patient 
with pneumonia. x 1,000. Stained by Gram’s method. Photomicro- 
graph by Frankel and Pfeiffer. 
Fie. 5.—Mierococeus pneumonie croupose in blood of rabbit. x 
1,000. Photomicrograph made at the Army Medical Museum, Washing- 
ton, by Gray. 
Fic. 6.—Bacillus of hog cholera, showing flagella. Stained by 
Loffler’s method. x 1,000. Photomicrograph made at the Army Medi- 
cal Museum, Washington, by Gray. 
