tRANSLATtONS FROM FORETON PARERS. 
333 
sense, it is loss in harmony with the nomenclature generally fol¬ 
lowed in pathology, and seems to isolate a special disease of an 
animal species from its analogues in other species. For that reason, 
I believe the gourme of the horse is variola. 
The greatest part of this paper will, however, be used to 
establish on as solid a basis as possible, the truth of this claim, 
already advanced by Gilbert, Dietrich and others. 
The causes of strangles have been lengthily studied in the trea- 
O o %J 
tises on this disease. 
As for all contagious diseases, two etiological facts must be 
examined : the primary development and the transmission by 
contagion. 
The first has not alone attracted the attention of veterinary 
authors. Most writers have given many pages on the subject. 
They have, with long detail, mentioned all the local causes likely 
to bring on disturbance in the equilibrium of the functions. 
In reproducing exactly the same condition, all have recognized 
that young age was a condition favorable for its development. 
With a few, it is only between two and six years that the disease 
runs perfecly through in evolution. Earlier it would not have its 
character proper, and might reappear subsequently. Thus pre¬ 
mature, it would not be sufficient!}’ depurative to relieve entirely 
the organism of predisposition it possesses from birth. 
All this, it is unnecessary to say, is purely hypothetical. If, 
indeed, it is incontestible that the disease is more commonly met 
in animals from five to six years, it is because at that age they are 
more unavoidably and for the first time exposed to contagion. At 
this time, indeed, they are sold to be transported, in raising 
climates, and are then gathered in various numbers in dealers’ 
stables or other locations. During these changes they have been 
in markets, at fairs, in public stables, transported in railways, and 
have in many instances been in contact with diseased subjects. 
Let but one of the animals be affected, which is too often the 
fact, and soon the disease extends to all those, which up to that 
