PLATE XII. 



FIG. i. Micrococcus tetragonus. 



From a section of a kidney of a mouse which had died 

 in eight days, after inoculation subcutaneously with 

 a pure cultivation. Encapsuled tetrads, isolated and 

 in masses, were found in the kidneys, lungs, and 

 other organs. Stained with Gram's method (gentian 

 violet) without a contrast stain, x 1,500. 



FIG. 2. Streptococcus pyogenes aureus. 



Micrococcus pyogenes aureus. 

 Staphylococcits pyogenes aureus. 



From a section of the liver of a rabbit. A small vessel 

 is shown plugged with cocci. From small abscesses 

 in the liver, cultivations were obtained of the 

 characteristic yellow coccus of pus. Stained with 

 Gram's method (gentian violet) without a contrast 

 stain. x 1,500. 



