OF THE OX. 81 



various diseases viz., those in which the ani- 

 mals blend together the typhous and exanthe- 

 matic diseases. The measles and the scarlet 

 fever, affecting the external or internal mem- 

 branes, are like the first steps of these maladies ; 

 they are generally slight, and we have but 

 to watch over the progress of the symptoms, 

 and to assist nature, which, with few excep- 

 tions, brings all things to a favourable issue. 



These disorders, which are relatively slight 

 and do not provoke in the economy any of 

 those changes which in some sort transform 

 the constitution, are not absolutely proof 

 against relapse. They lead us rationally and 

 by degrees to the more infectious and con* 

 tagious diseases, to the common typhus ; there- 

 fore it is unnecessary to apply the preventive 

 treatment to them, that being exclusively 

 reserved for the latter. 



Let it then be well understood, that the 

 typhus of the ox, the study of which we are 

 about to enter upon, may vary in its symptoms 

 and post-mortem appearances, without losing 

 thereby the characteristic mark which renders 

 it a thoroughly distinct, and, in the present 

 day, a thoroughly well known distemper. 



