p IG> 5 ._MicROCOccus TETRAGENUS. 



Cover Glass Preparation, Splenic Fluid, Carbol-Fuchsine, 

 ^ apochromat, Projection ocular 6. x 1000. 



FIG. 6. SARCINA FLAVA. 



Cover Glass Preparation, Gelatine Culture, Gentian-Violet, 

 apochromat, Projection ocular 6. x 1000. 



