8 4 



MICRO-ORGANISMS AND DISEASE. [CHAP. 



the subcutaneous tissue ; peritonitis ; spleen much enlarged ; 

 slight pneumonia. A hypodermic syringeful of the blood 

 of this animal was injected under the skin of a second 

 rabbit, and this died after forty hours. Post-mortem exa- 

 mination showed the same lesions as in the first case. In 



V-V 

 2 ' . .'. 



FIG. 29. FROM A PYOGENIC MEM- 

 BRANE COVERING THE SfiRuUS 



COAT OF THE INTESTINE OF A 

 RABBIT DEAD OF PYAEMIA. 



1. A large oval nucleus, probably the 



nucleus of a detached endothelial 

 cell. 



2. A pus corpuscle. 



The rest of the pyogenic membrane is 

 beset with small micrococci. 



FIG. 30. PYAEMIA OF RABBIT. 



Blood of spleen. Between red blood- 

 discs three dumb-bells and two 

 single micrococci are shown. 

 (Gentian violet staining.) 



[The micrococci as here represented 

 are somewhat too large.] 



the blood-vessels of the affected parts were present micro- 

 cocci, single, as dumb-bells, and in zoogloea ; they were 

 spherical, about 0^00025 mm. in diameter, (d) Micrococcus 

 causing septicamia in rabbits. An infusion of meat was 



/ 



f 



FIG. 31. OVAL MICROCOCCI FROM THE BLOOD-VESSEL OF THE SPLEEN OF A 

 RABBIT, DEAD OF KOCH'S SEPTICAEMIA. 



prepared ; this was left to putrefy, and of this fluid a quantity 

 was injected under the skin of the back in two cases. Ex- 

 tensive gangrene with much oedematous exudation followed, 

 and death ensued in two days and a-half. The blood, the 



