Explanation of Plate 23. 



BACTERIUM SYNCYANEUM. (Ehrenb.) Lehm. and Neum. 

 (Bacillus cyanogenes Miigge; blue milk.) 



I. -III. Gelatin stick cultures, six to ten days at 22. 



Other shades of color are also observed. 

 IV. Agar stick culture, ten days at 37. 

 V. Bouillon culture, four days at 37. 

 VI. Milk culture, three days at 37, upon non-steril- 

 ized milk. 

 VII. Microscopical preparation. Pure culture from 



agar plate, x 800. 

 VIII. Microscopical preparation. Pure culture. Fla- 



gella stained with Loffler's mordant. 

 IX. Bacteria with flagella ; one or more at a pole, x 

 1,000. Stained by Loffler's method. 



IX. 



