OF THE OX. 161 



tern, that promoter and regulator of all the 

 functions, is upset? when the lungs which 

 revivify the blood, when the digestive organs 

 which are the very sources of alimentation, 

 are smitten with stagnation ? when, in fine, 

 not only these vital centres have ceased to 

 operate, but when each by itself is the cause 

 of torturing pains and exhaustion ? 



The typhus, moreover, is observed in all 

 animals of the bovine species, whatever may 

 be their race, their age, or their sex. The 

 recovered animals may live with impunity 

 amidst diseased herds of cattle, thanks to its 

 non relapsive nature. Jessen has even 

 witnessed cows which, after their own cure, 

 communicated a sort of immunity to their 

 offspring. For the same reason it is that 

 epizootias are less fatal in those countries 

 where they often occur, the constitutions of 

 those animals which are engendered amongst 

 such habituated herds, preserving a prophylaxy 

 inherent to the blood which has been trans- 

 mitted to them. 



Besides, what a pregnant subject is this for 

 the physician, and what more meritorious task 

 can he set himself than the treatment of 



