204 CAUSES OF GLANDERS. 



been known to break out in stables through or near which common 

 sewers or infected streams of water have run." — " Marasmus is 

 sometimes the precursor of glanders : it may also arise from 

 wounds penetrating the nasal bones, or frontal, zigomatic, or maxil- 

 lary sinuses; from carious molar teeth: though, in this case, it en- 

 tirely depends upon local lesion." 



DUPUY, 1817, states in one of his corollaries, "That almost all 

 veterinarians have adopted the idea of contagion ; though some 

 few have advanced an opposite opinion." And in the one fol- 

 lowing : " that I (Dupuy) know of no well-conducted experi- 

 ments in favour of contagion; whereas there are some against it*." 



Coleman, who barely admitted the contagiousness of glanders, 

 will best have his opinions on the subject set forth, in his own happy 

 way of expressing them, by the following extract from his Lecturest. 



" The disease has been long known to be contagious, to be com- 

 municable through the medium of contaminated stables, and by 

 inoculation; hence it has been concluded that it had no other 

 origin but contagion. Most physiologists, indeed, have supposed 

 that contagious diseases could not arise from any other cause; 

 and there are certainly some animal poisons whose operation 

 appears to favour this hypothesis ; but, in prosecuting our investi- 

 gations, it would seem that every such poison is governed in its 

 operation by certain laws peculiar to itself : as different medicines 

 produce different effects, so the different poisons of contagious dis- 

 eases appear to possess peculiar properties, though the diseases 

 themselves all in common admit of propagation by contagion. 

 There are several diseases affecting the human subject, that, ac- 

 cording to general opinion, can only be generated by contagion ; 

 such are syphilis, small-pox, measles, and hooping-cough. When a 

 person has contracted any one of these diseases, it is said that he 

 has been in the vicinity of contagion or infection ; and it may be 

 impossible to prove, beyond all suspicion, the contrary ; but, what 

 was it that^r^^ bred these disorders ] Not contagion ; but a com- 

 bination of certain causes ; and, being once engendered, they be- 

 came contagious. We have examples of this in jail and ship 



* Del'Affection Tuberculeuse, vulgairement appelee Morve^ &c. &c. 1817. 

 t Published in the third volume of my '•'' Lavlarcs on the Veterimiry Artr 



