GENERAL REPORT OF THE SCIENTIFIC COMMISSION. 339 
mitted a second time to the same proofs, and of these 18, 
4 a third time. t 
These 18 animals became disposed of as follows : — 
5 had contracted the disease at the end of the first cohabitation, and were 
cured, 
9 proved refractory to the first influence of contagion, 
4 experienced no other indisposition than that arising from the first co- 
habitation. 
As to the 4 animals who were submitted to the first co- 
habitation, they made part of the category of those who had 
contracted the disease from the first contact, and who were 
cured. 
None of the 18 subjects submitted to these fresh proofs, 
in such conditions, either contracted peripneumonia or pre- 
sented even the slightest symptoms of indisposition. 
From results obtained from such experiments of cohabi- 
tation, the committee have drawn the following conclusions : — 
1st. That the epizootic peripneumonia of horned cattle is 
susceptible of transmitting itself through cohabitation, from 
sick animals to those in health of the same species. 
2d. That all animals exposed to contagion through co- 
habitation do not contract peripneumonia ; there being some 
among them who thoroughly resist the contagious influence ; 
and others who do but experience, under such influence, a 
slight indisposition and one of very short duration. 
3d. Among the animals who contracted the disease, some 
recovered, and obtained with their recovery every external 
appearance of health, while others succumbed. 
4th. Such animals as presented symptoms but of slight 
indisposition after a first cohabitation, appeared preserved by 
this trial, for the future, against other attacks of peripneu- 
monia. 
5th. Animals who had been for once attacked with pneu- 
monia, did not appear susceptible again of its influence. 
Such are the general conclusions which the committee 
believed itself authorised to draw from such experiments of 
contagion through cohabitation. As to the questions of 
ascertaining what may be, in a herd exposed to the influence 
of contagion, the relative proportions of animals remaining 
resistent to contagion, of those who become indisposed, and, 
lastly, of those who contract pneumonia — and among these 
last what is the relation of the dead to the recoveries, — the 
committee have not contemplated uniting so large an assem- 
blage of facts, in order to come to a conclusion that might 
express absolutely the conditions habitually passing in prac- 
