342 BACTERIA IN INFECTIOUS DISEASES. 



by others, and Brnylants and Verriest describe tbe 

 organism, which they were able to cultivate in 

 sterilized fluids, as a micrococcus, sometimes isola- 

 ted, sometimes in pairs, and sometimes in chains 

 of 3-10 elements. The form is slightly oval, and 

 the size varies considerably, the largest measuring 

 1 p. in diameter. 



Protective inoculations are successfully practised 

 in this disease. 



INFECTIOUS PNEUMONIA. That there is an in- 

 fectious form of pneumonia in man is now pretty 

 generally admitted upon clinical evidence ; and 

 several observers have described micro-organisms 

 supposed to bear a causal relation to this disease. 

 Klebs claims to have produced lobular pneumonia 

 in rabbits by injecting the sputum of patients suf- 

 fering from pneumonia, in which he found an or- 

 ganism called by him monas pulmonale. Friedlander, 

 also, found micro-organisms in eight successive 

 cases in the expectoration and in sections of pul- 

 monary tissue. These micrococci were elliptical 

 in shape, one micro-millimetre in length, and 

 two-thirds p, in breadth. They were usually in 

 pairs, but also occurred in chains, and were found 

 most abundantly in the fibrinous expectoration, 

 and in grayish-red hepatization. 



The writer would call attention to the fact that 

 these oval micrococci seem to resemble closely those 

 found in the blood of a rabbit killed by the subcuta- 

 neous injection of human saliva. (See Fig. 3, Plate 



