402 
M. t. TRASBOf. 
stallion and mares by Lautour and Dayot, and which, under the 
name of coital exanthema, was described by Hering, Rychner, 
Straub-and Roerber ? The time between the contaminating coition 
and the appearance of the pustules, their form, their confluence 
upon the genital organs and their limited generalization upon 
the body, and the radical cure of the disease in two or three 
weeks—all these characteristics leave no doubt that it was horse- 
pox overlooked. This was proved by the experiments of M. 
St.. Cyr. It is not uncommon to meet these eruptions very 
abundant round the anus of the male and tire vulva of the mare 
during the evolution of gourme caught by any other way. If 
a mare then be covered by a young stallion, virgin of the 
disease, he will have a good chance of being inoculated at the 
penis, and thus to propagate the disease on a large scale. If, 
again, as it is common, some mares are presented to two stal¬ 
lions, there will be such a multiplication of inoculations that 
soon a large enzootic will appear similar to those which we read 
of. Coition then may be considered as a cause of propagation 
by a direct inoculation. Whether this fact is established or not, 
what is incontestible is, that it is possible, as long as a specific 
eruption is found upon the lips of the vulva. 
It may take place again by other means. Thus, the tools 
used for cleaning, for instance, must frequently be the means 
by which the virus is transported from one animal to several 
others. The currycomb especially may act so, and particularly, it 
may be said, will this take place so long as the vaccinagenous 
lymph is active while liquid and fresh. Also, as proved by M. 
Chauveau, when the lymph is dry and in a pulverized condition. 
Many other accidental inoculations similar to this are un¬ 
necessary to be mentioned here. 
These different examples are sufficient to give a general 
idea of all the circumstances under whose influence contagion 
by fixed virus or accidental inoculation may take place. 
Contagion by volatile virus is denied by no one. Even 
without known facts, one will admit it. All known variola 
among the different zoological species are transmitted without 
immediate contact; between animals of the same species equine 
