ON INOCULATION OF PLEURO-PNEUMONIA. 407 
lated subjects, and with beasts of the same country who 
have never been submitted to the proof of inoculation 
Such are the facts w hich an abstract of the official reports 
of foreign Commissions has permitted the French Commis- 
sion to obtain. 
The experiments of these Commissions come to, by their 
results, the same conclusions as the French Commission had 
formed, according to its own inquiries, on the preventive 
virtue of inoculation, but they do not possess an equal pro- 
bative w r orth, because they have not been made under iden- 
tical conditions relatively to the number and choice of 
subjects and the duration of the experimentation. 
Nevertheless, if we come to group together the facts ob- 
tained by the experiments of the French Commission and 
those of the Netherland Commission, which are sufficiently 
analogous to the first to bear a comparison with them, we 
-arrive at this remarkable result, that, of 100 inoculated 
animals, all but 2 contracted peripneumonia, while of the 
same number of subjects uninoculated and submitted to the 
proof of contagion through cohabitation, upwards of 65 w 7 ere 
seized w 7 ith the disease and 17 succumbed. 
Let us now, from the number of published statistics 
up to to-day, take a view of the results ascertained in prac- 
tice, in having recourse to inoculation in order to prevent 
or arrest the ravages of the epizootic among the herds 
threatened by it, or who suffered from its attacks. 
B. EXPERIMENTS OF INOCULATION ACTUALLY PRAC- 
TISED ON HERDS OF BEASTS THREATENED OR SUF- 
FERING FROM EPIZOOTIC PERIPNEUMONIA. 
1. Experiments of the Scientific Commission of Holland . 
The total number of animals on which experiments of 
inoculation have been practised, as made knowm by the 
Netherland Commission in its first report, has risen to 247, 
resolving itself into 
154 milch cows. 
6 young cows never as yet having become impregnated. 
82 heifers. 
5 calves. 
Total 247 
All these animals were the property of farmers in the 
neighbourhood of Utrecht, where the peripneumonia raged 
so long a time. 
