OF THE OX. 199 



elucidation has not yet been found for these 

 diseases ; at some future day they will be 

 methodically divided and arranged, and each 

 of them will then receive a special title, which 

 will remove from the mind that vague uncer- 

 tainty which at present we regret. 



But if some faults of doctrine are open to 

 debate, no doubt whatever can exist in the 

 mind as to the morbid individuality of ox- 

 typhus, or the general conditions of its patho- 

 genia ; and we are able to deduce from the 

 preceding explanation, the following conclu- 

 sions as so many propositions definitively 

 settled : 



1st. The typhus of the ox is a disease essen- 

 tially infectious, which is produced by the 

 absorption of the morbigenous miasma in the 

 air. 



2nd. This typhic miasma is absorbed and 

 engendered by the ox, under the influence of 

 a number of special deleterious causes. 



3rd. When the miasma has been absorbed 

 and incubation produced, the disease itself is 

 but a supreme effort of nature a struggle 

 between the vital forces and the morbid evolu- 



