Explanation of Plate 3. 



MICROCOCCUS AGILIS. Ali-Cohen. 



I. Gelatin stick culture, six days at 22. 

 II. Gelatin plate, seven days at 22. x50. On right 

 side, superficial colony; on left side, deep- 

 seated colony. 



III. Agar plate, seven days at 22. Natural size. 



IV. Microscopical preparation (x600) from an agar 



culture two days old. The individual cocci 

 vary greatly in size, and are more irregular than 

 appears in the plate. 

 V. Potato culture, ten days at 22. 



MICROCOCCUS GONORRHOEA. Neisser, Bumm. 



VI. Smear preparation from gonorrhceal pus. x 1, 000. 

 The large blue cells are pus cells. 



VI. a. Smear preparation from gonorrhceal pus. X 

 1,200. Semi-schematic. 



VI. b. Diplococcus gonorrhcese much enlarged. Sche- 

 matic. 



STREPTOCOCCUS MENINGITIDIS CEREBROSPINALIS. 

 (Weichselbaum) Lehmann and Neumann. 



VII. Smear preparation from meningeal exudation ; pus 

 cells with transversely divided diplococci. (Cop- 

 ied from Jaeger: Zschr. f. Hyg., Vol. XIX., 

 . PI. VI., Fig. 3.) About x 1,200. 



VIII. Microscopical preparation; pure culture, forma- 

 tion of tetrads. Aboutx 1,200. (Copied from 

 Jaeger: Zschr. f. Hyg., Vol. XIX., PI. VII., 

 Fig. 6.) 



