PLEI] BO-PNEUMONIA. 599 



and 6 of the 1 1 animals of the last experiment which were 

 regarded as having escaped free, were found, on being de- 

 stroyed, to bear distinct evidence of having been affected. 

 This, therefore, modifies the foregoing calculations, and the 

 numbers should stand thus : 



15 enjoy immunity, or 32 '61 per cent. 

 10 indisposed, 2172 



17 animals cured, 36 -83 

 4 dead, 8'84 



46 100-00 



Of the 42 animals which were exposed in the first experi- 

 ments at Pomeraye and Charentonneau, and which escaped 

 either without becoming affected or recovering, 18 were sub- 

 mitted to a second trial, and of these 18, 4 were subjected to 

 a third. 



Of the 1 8 animals, 5 had in the first experiment suffered 

 from the disease and had recovered, 5 had never become 

 affected, and 4 had been indisposed. The 4 animals sub- 

 mitted to the influence of contagion a third time had been 

 affected on the occasion of the first trial. None of the 18 

 animals contracted the disease during these renewed ex- 

 posures to the influence of contagion. 



From the results of these experiments the Commission has 

 drawn the following conclusions: 



Firstly, The epizootic pleuro-pneumonia is susceptible of 

 being transmitted from diseased to healthy animals by co- 

 habitation. 



Secondly, All the animals exposed do not take the disease 

 some suffer slightly, and others not at all 



Thirdly, Of the affected animals some recover and others 

 die. 



