INOCULATION FOR PLEURO-PNEUMONIA IN CATTLE. 165 
In bringing this Report to a conclusion, I am desirous of 
adding the statements of two or three persons with whom I 
had interviews, in order to prove how much has yet to be 
learned respecting the value of inoculation, and the necessity 
also which exists for the adoption of independent experi- 
ments. M. Maris, veterinary surgeon of Hasselt, and one of 
the Commision appointed by the Government, says 66 that 
he wants more experience in the operation, as he is not satis- 
fied with his own or Dr. Willems 5 inoculations. He has 
operated on upwards of a thousand animals since the 15th of 
April, w r ith seventeen deaths ; and has furnished the Govern- 
ment with the full details of these cases. Since April he has 
attended about fifteen or sixteen animals affected with pleuro- 
pneumonia in the town. Hasselt, during the summer, is in 
general pretty free from the disease, and fresh cattle entering 
it at this period of the year are not so susceptible of the 
malady as those located there. In November the disease 
usually begins, and becomes more rife through the winter. 
Some of the distillers have not inoculated, nor have they had 
the disease : others commenced the plan, but discontinued it 
from the casualties attending the process. A great many 
animals have lost their tails. He frequently inoculates in 
the dewlap, but is most careful in selecting the “ virus. 55 Of 
fifty animals successfully inoculated at first, twenty-five took 
by a re-inoculation. A cow, successfully re-inoculated at St. 
Trond, had the natural disease ten days afterwards, but re- 
covered, from the treatment had recourse to. At St. Trond, 
also, three cows died from pleuro-pneumonia, which had been 
satisfactorily inoculated ; the first was attacked twenty days 
afterwards, the second two months, and the third three 
months and a half. These animals were under the care of 
M. Wainots, veterinary surgeon of that place. 55 
Another veterinary surgeon of Hasselt, M. Yaes, says ce that 
since April he has inoculated four hundred animals with com- 
plete success — that all have been exposed to the contagion 
with impunity. Has tried ^-inoculation on twenty, and only 
one was affected a second time. The rtf-inoculation was done 
four months after the first. About 2 per cent, die from the 
inoculation. Of one hundred and thirty beasts ten only lost 
their tails. Believes fully in the advantages of inoculation, 
and that no other preventive but this is of any use. 55 
M. Douterluigne, veterinary surgeon of Brussels, also a 
member of the Government commission, says “ that his own 
inoculations too often prove destructive of the organism of 
the tail, which inflames and passes on to a gangrenous con- 
dition. That he is perfectly satisfied that very many ani- 
mals will take by a second after a first successful inoculation. 
