230 MICROBES, FERMENTS, AND MOULDS. 
Under a strong magnifying power, this micrococcus 
is seen to be shaped like a lance-head, and short rods, 
terminating in a cone, are found withit. Itis probable 
that the micrococcus is the early form of the microbe, 
which becomes a bacillus in the adult form (Cornil). 
The presence of a microbe in pneumonia explains 
many facts which had remained obscure in this 
disease, especially the epidemics in a room or house, 
when several persons living together are successively 
attacked by pneumonia, It likewise explains the 
resemblance, which has long been indicated by their 
common name, between the pneumonia of man and 
the contagious pneumonia of cattle, which is well 
known to be essentially epidemic, transmissible by 
contact and inoculation. 
A culture of the microbe of pneumonia can be 
made, and when it is inoculated into the tissue of the 
lung, it produces in animals a true pneumonia. 
XIII. Some oTHER DISEASES CAUSED BY MICROBES. 
We shall only say a few words about several other 
diseases, admitted to be contagious, and in which the 
presence of a special microbe has been ascertained. 
In the pus-corpuscles of gonorrhcea, very minute’ 
and mobile micrococci may be observed, often associated 
in pairs, in fours, or in a small mass, but rarely in 
chaplets (Fig. 94). 
