OF THE OX. 87 



exclusively concentrated on that particular 

 race of animals and on those countries smitten 

 with the curse, in order to arrest and confine 

 the disease within its one and only focus. 



The supporters of this theory, concerning 

 the first circumscribed origin of the typhus, 

 maintain that all the epizootics whose deplor- 

 able history we have given in the first part of 

 this work, have had no other generative causes 

 than the propagation of the complaint, born 

 and begotten on the banks of the Wolga and 

 the Danube, and subsequently conveyed to the 

 different parts of the earth by the emigration 

 of the cattle. And in this manner, too, they 

 have accounted for the appearance of the 

 typhus in South America, in Africa, and in Asia. 



Since this doctrine on the origin of the 

 typhus has been conceived and maintained by 

 men of a high order of understanding, we must 

 suppose that they had been struck and con- 

 vinced by important facts and serious reasons ; 

 and as it would be unfair to oppose a plain 

 denial to an opinion now so generally adopted, 

 we are bound to say in what manner these 

 authors justify their views, after which we 

 shall endeavour to refute them. 



