PLEURO-PNEUMONIA IN CATTLE. 
409 
Sir, I only wish to call your attention, as well as that of 
competent men, to a single preservative measure, which of 
itself is worth more than all the ethers. All curative 
measures, however efficacious they may be, are powerless in 
setting an obstacle to the evil, and in repairing the con- 
siderable losses which it occasions every day. The beasts 
which are cured by treatment fall away rapidly, and 
recover but slowly and with difficulty from the attack they 
have sustained. 
The only true and good measure that all should endeavour 
to discover is a preservative measure. This measure. Sir, I 
believe I have found. The method that I have pursued is 
very rational and very simple in its execution, and there will 
be said of it perhaps, when it becomes known, what was 
formerly said to Christopher Columbus, who had just dis- 
covered a new world : “1 hat nothing was more simple and 
more easy to imagine and to put in execution.” 
The measure I have made use of is sanctioned by the 
authority of facts. From the day when I timidly employed it 
for the first time, after having matured it for a length of time 
in my ideas, it has never for a single instant failed in 
practice. 
My observations and experiments have been made upon a 
large scale : my father has constantly in his stables, from 80 
to 1 10 head of large cattle, which were all at my disposal to 
serve for my experiments. These experiments date from 
February 10th, 1851, and have been made upon 108 indi- 
viduals of the bovine race : a note setting forth my 
experiments has been deposited in the hands of the proper 
authority for many months. 
As I have had the honour to tell you, pleuro-pneumonia 
has raged with intensity in our stables, and in those of all 
the distillers and small farmers of the town and its vicinity, 
from 1836 to the present time. 
From the moment of the appearance of the scourge, we 
have never been free from its strokes ; we have had a consider- 
able number of beasts diseased, and have suffered important 
losses. 
Emboldened by misfortune, I tried a measure which ought 
perhaps to have turned to my disadvantage; 1 made my 
experiments at first clandestinely, without my father’s know- 
ledge, for fear of unfortunate results ; and, in fact, whether 
from ignorance, or from the improper application of my 
remedy, I killed three fine oxen of the aggregate value of 
1000 francs (40/.) But against these reverses 1 experienced 
some success, and I asked my father’s permission to continue 
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