138 THE CONTAGIOUS TYPHUS 



2nd. That the cattle typhus, although it 

 exists not necessarily, but through the impro- 

 vidence or want of caution in man, on different 

 parts of the earth, never appears at all in the 

 temperate and more genial zones, save under 

 particular and special circumstances, analogous 

 in some degree with those which generate the 

 human typhus inclemency of the seasons, 

 overcrowded dwellings, bad or insufficient food, 

 and want of cleanliness ; and that these par- 

 ticular and special circumstances give birth to 

 the epizootic genus, rendering the cattle fit 

 and apt to receive the germs of the contagious 

 virus, and to foster its incubation. 



3rd. That the cattle typhus, thus acciden- 

 tally developed in the temperate and genial 

 zones, by means of the vicious hygienic con- 

 ditions amidst which horned cattle are accus- 

 tomed to live, and which serve as the causes of 

 its propagation, is afterwards transmitted by 

 the contact of animals living in the same stall 

 or shed, or collected in herds on the same 

 ground, or transported in the same vehicles, 

 by land or sea. 



4th. That the droppings of animals, their 

 litter, their dead bodies, and their detritus, or 



