304 



BACTERIA IN INFECTIOUS DISEASES. 



Fig. 12. 

 Pus cell invaded by micrococci, Ogsten. X 2600 diameters. 



pairs being first formed, each of which again formed 

 pairs, and so on. ... In some cases, unusually large 

 oval cocci existed, chiefly in pairs. . . . Sufficient evi- 

 dence was not obtained to decide whether these differ- 

 ent appearances indicated different species of micrococci ; 

 but the constancy with which chains produced only 

 chains, and groups only groups, in the experiments that 

 fall to be detailed subsequently, rather favored the 

 suspicion of their being so." 



The invasion of a pus cell by micrococci is 

 shown in Fig. 12, which is copied from the plate 

 accompanying Ogsten's report. When due allow- 



