GENERAL REPORT OF THE SCIENTIFIC COMMISSION. 341 
have deemed it prudent to notice the circumstance of two 
cows having been inoculated with mucus from the nose, 
which afterwards were submitted to contagion through 
cohabitation, and yet have not taken the disease. 
The experiments of inoculation with fluid extracted from 
the lungs of a beast affected with peripneumonia, have been 
performed on 54 animals perfectly sound, and in such con- 
ditions of looking after, that they have never been exposed to 
any contagion whatever. Here is the result: — 
Of the 54 subjects inoculated, none have taken peri- 
pneumonia afteF inoculation. 
On 33, the effects of inoculation have shown themselves 
only by a slight local and very circumscribed inflammation. 
And in 21, this inflammation, consecutive of inoculation, 
has been very severe and extensive, and complicated with 
sanguineous phenomena, the consequences of which have 
proved mortal in 6 of the inoculated subjects. 
Consequently the number of animals on whom inoculation 
has proved benignant, has been 61*11 per 100. 
The proportion of them in whom gangrene has shown it- 
self, as a consequence of inoculation ; and produced the 
loss of the tail, is 27*77 „ 
And those who have died, are . . . . . .11*11 „ 
So that 88*88 subjects out of 100 escaped, after having 
undergone inoculation, with their health, and recovered, while 
11*11 succumbed to the consequences. 
Of those 48 subjects who have undergone inoculation and 
have come out safe and sound, 2 have died from accident 
unconnected with this operation, and 34 have been exposed for 
a period of five or six months to the direct influence of con- 
tagion through cohabitation, with 24 subjects under the same 
management not inoculated, for the purpose of serving to 
make a comparison. 
Twelve inoculated animals, who had been placed in a stable 
by themselves in order that they might serve for some ulterior 
experiments, *were not exposed to any direct contact with 
animals having peripneumonia, though they were looked after 
by the same cow-man who had charge and care of those 
labouring under the disease. Of these inoculated subjects, 
one only (at the rate of 2 per cent.), living in a stable uncon- 
taminated, contracted peripneumonia; whilst of the 24 animals 
uninoculated, serving for comparison, who were submitted to 
the direct influence of contagion at the same time with the 34 
inoculated subjects, 14 (at the rate of 58 per cent.) with or 
without symptoms apparent, have felt the contagious in- 
fluence. 
XXVII. 
45 
