98 THE CONTAGIOUS TYPHUS 



In fine, let us recapitulate in our minds all 

 the causes of destruction to which these passive 

 creatures are exposed, and we shall acknowledge 

 that there is no necessity to attribute to them 

 a peculiar organization in order to understand 

 the development of the typhus, which, at a 

 given moment, cuts them all off; and that in 

 the deltas of the different countries, as well 

 in Asia, Africa, and America, as in Europe, 

 are to be found those conditions of infectious 

 disease which we have described. In these 

 causes, and only in these causes, or in those 

 which resemble them, will rational men seek 

 for the principle of the contagious typhus in 

 the bovine race. 



Moreover, who is there who does not under- 

 stand that what is true with regard to cholera 

 is likewise applicable to this contagious typhus ? 

 The cholera, for causes analogous to these, 

 subject to the particular state of the soil, is 

 generated, not exclusively, it is true, but most 

 frequently, on the banks of the Ganges, in the 

 same manner as the contagious typhus is 

 developed in certain countries where its 

 natural focus is found. 



The race of animals which exists on this 



