90 A NEW MEMOIR ON PLEURO-PNEUMONIA. 
rived from inoculation for peripneumonia, have now in their 
stables 206 head of cattle, a number no other distiller in the 
place possesses ; whilst in preceding years, at the same season, 
those gentlemen had themselves no more than 150 beasts in 
their stables. M. Plate!, a distiller, who, as all the w’orld 
hereabouts well knows, has seen his stables decimated at dif- 
ferent times through pleuro-pneumonia, and has not in con- 
sequence, since 1840, dared to purchase any cattle, is now 
actually employed in filling his stables anew. 
“Up to the present time, 12th September, more than 1350 
head of cattle have been inoculated in the tail in my father’s 
stables, and (since the 29th of April, 1852) throughout the 
whole of the stables of the distillers here, whose beasts were at 
the time suffering from the scourge. MM. Rousseau and 
Stellingwerf, possessing but few beasts, and not having at 
the time when I made the first inoculations public the 
disease among them, would not submit them to inoculation ; 
and, remarkable enough, while all the other distillers were 
without the disease, M. Rousseau had to entertain pleuro- 
pneumonia in his stables; which commenced on the 18th of 
August, from a Dutch ox that was sold to M. Gilkurs, the 
butcher, who disposed of it for consumption to the camp at 
Beverloo. On the 20th of September a second ox fell sick of 
pleuro-pneumonia, a fact which occurred under the eyes of 
MM. Simonds and Morton, Professors at the Veterinary 
College of London, who did me the honour at the time of 
paying me a visit. 
“Of the 1350 beasts inoculated, 11 succumbed under the 
effects of inoculation, according to the official returns made 
to the Maison de Ville, while one contracted pleuro- 
pneumonia on the 2d of September, a beast belonging to 
M. Thiers, distiller. Be good enough, however, to notice, 
sir, that in this beast, although he had been inoculated, his tail 
showed no sign of it ; the inoculation had taken no effect, and 
this will explain to you why I recommended re-inoculation 
to be practised on all beasts on whom the first inoculation 
had no consecutive local effect. 
“ Is it necessary for an animal to be preserved from pleuro- 
pneumonia by inoculation, that there be produced the ordi- 
nary morbid manifestations in the inoculated part? I do not 
think it. I consider the action of the pneumonic virus in- 
troduced into the beast’s organism as a kind of dynamisation ; 
i. e ., that the poison introduced at the tail, or through any 
other part of the body, becomes absorbed, enters into the blood, 
acts upon this, modifies it, and so influences all organs that 
it renders them incapable of contracting pleuro-pneumonia. 
