NEW RESEARCHES UPON PLEURO-PNEUMONIA, ETC. 
419 
the meeting of Nov. 3d, 1878, all the Veterinary Societies of 
northern France expressed the opinion that “ it can never rise 
spontaneously.” 
By the above it is proved that pleuro-pneumonia proceeds 
exclusively from contagion, and consequently it belongs to veter¬ 
inary science to indicate the measures to be taken to stop its 
spreading, and it becomes the duty of the government to prohibit 
the transport and sale of suspected animals, as they are the sources 
from which contagion proceeds through expired air, discharge 
from the nose, soiling of trucks, &c., &c. 
II. 
Exudative pleuro-pneumonia is inoculable and infectious ; it 
is transmissible from one animal to another by inoculation of the 
pathological products and by contagion or volatil virus. When 
in 1852, I proclaimed the inoculability of bovine pneumonia, I 
met with many who were incredulous. However, since then, M M. 
Villemin, Chauveau, Saint-Cyr and others, have admitted the prob¬ 
ability of inoculating diseases of the chest, and especially pulmon¬ 
ary phthisis, the best known and unfortunately most spread, as it 
carries off one fifth of the population of the globe. 
Exudative pleuro-pneumonia depends for introduction into 
the economy of the virus or contagious principle, no matter how, 
either through the intermediate of the air, upon the mucous mem¬ 
brane of the bronchia and lungs, perhaps even also upon a denu¬ 
ded part of the body of the animal, where absorption can rake 
place, either by direct inoculation in the cellular tissue of the 
dermis, or anywhere else. 
Once introduced in the body of the animal, the contagion pro¬ 
duces first a local alteration of the tissues, an inflammatory pro¬ 
cess, soon followed by general troubles which are the manifesta¬ 
tion of the disease. But what is the cause of this inflammatory 
process ? It is not an ordinary inflammation of the tissues ; it is 
peculiar and specific. 
Pleuro-pneumonia is a general disease, accompanied with fever* 
manifested by chills, dullness, tympanitis of the abdomen, first 
