- A CONTRIBUTION TO THE MORPHOLOGY OF BACTERIA. 9 
EXPLANATION OF PLATE 1, 
Illustrating Dr. E. Klein’s paper, “A Contribution to the 
Morphology of Bacteria.” 
All figures are reproductions from photograms magnified 1000. 
Fic. 1.—Cover-glass specimen of Bacillus anthracis growing in gela- 
tine plate, two days old. Many of the bacilli are changed into spherical or 
oval masses, containing vacuoles. 
Fic. 2.—Cover-glass specimen from an impression of a gelatine-plate 
cultivation of Bacillus anthracis, two days’ growth. Instead of the 
typical threads of cylindrical bacilli, there are threads made up of thick spindles, 
the protoplasm in many of these vacuolated. 
Fic. 3.—From the same plate cultivation as the previous figure. Copious 
vacuolation. 
Fie. 4.—From an agar culture of the Bacillus diphtheria, grown at 
37° C. for two days, showing typical club-shaped filamentous bacilli. 
Fies. 5 and 6.—Diphtheria bacilli, derived from the milk of a cow infected 
with diphtheria. The bacilli had been growing on gelatine. Typical club- 
shaped filamentous forms. 
Fies. 7 and 8.—From glycerine-agar cultivations of the tubercle bacilli. 
Filamentous bacilli with terminal knob-like enlargements, some showing 
distinct branching. 
