Explanation of Plate 29. 



BACTERIUM PYOCYANEUM. (Fliigge) Lehm. and Neum. 

 (Green pus.) 



I. Gelatin stick culture, three days at 22. 

 II. Agar streak culture, two days at 37. 



III. Gelatin plate, two days at 22. x60. Deep- 



seated colonies and some immediately beneath 

 the surface, in younger and older stages. 



IV. Gelatin plate, five days at 22. x 60. Part of a 



superficial colony. 



V. Gelatin plate, two days at 22. Natural size. 

 VI. Agar plate, two days at 37. Natural size. 

 VII. Agar plate, two days at 37. x 60. Below, deep- 

 seated ; above, superficial colonies. 

 VIII. Potato culture, three days at 37. Natural size. 

 IX. Microscopical preparation. Pure culture from 



agar plate, x 800. 



X. Bacteria with one, more rarely two polar flagella. 

 X 1,000. Loffler's stain. 



29 



