114 



MODERN BIOLOGIC THERAPEUSIS 



infectious nature of pneumonia was first advo- 

 cated by Juergensen in 1872. The discovery of 

 the pneumococcus may be attributed to Stern- 

 berg and to Pasteur, who published almost sim- 

 ultaneously accounts of the lance-shaped diplo- 

 coccus, found in the normal mouth, which was 

 able to induce a fatal septicemia in rabbits. 

 They, however, did not associate the organism 

 of the mouth with the various pathologic lesions 

 which we now 

 know to be caused 

 by the pneumococ- 

 cus, and it was only 

 after the thorough 

 studies of Fraenkel 

 and of Weichsel- 

 baum that the con- 

 stant association of 

 the pneumococcus 

 with lobar pneu- 

 monia was satisfac- 

 torily determined. 

 Sir Herman Weber in England, Juergensen in 

 Germany, Rodman and Austin Flint in this 

 country were pioneers in establishing our mod- 

 ern conception of pneumonia. 



Pneumococcus in peritoneal 



DUS. Stained with fuchsin. 



Clear spaces indicate capsules. 



X 1,000 diameters. 



