ROUGET 



107 



the average for the twelve years is 0.94. So we 

 may say that the whole average loss of vaccinated 

 sheep, whether from vaccination or from the disease 

 itself, is about 1 per cent. The loss of vaccinated 

 cattle is still less : for the period of twelve years, it 

 is 0.34, or about J per cent. 



" These results are extremely satisfactory. It is 

 to be noted especially that the average annual 

 death-rate from charbon, before vaccination — the 

 average given in these reports — is estimated at 10 

 per cent, among sheep, and 5 per cent, among 

 cattle. But even if we put it at 6 per cent, for 

 sheep, and 3! per cent, for cattle, and say that the 

 worth of a sheep is 30 francs, and of an ox or a cow 

 150 francs — which is well below their real value — 

 even then it is obvious that the advantage of these 

 vaccinations to French agriculture is about five 

 million francs in sheep, and two million in cattle. 

 And these figures are rather too low than too high. 



2. Roitget. 



" Some years after the discovery of vaccination 

 against charbon, M. Pasteur discovered the vaccine 

 for a disease of swine known under the name of 

 rouget. From 1886, these vaccines were prepared 

 and sent out under the same conditions as the 

 vaccines against charbon. The following table 

 gives the reports that have come to us of this 

 disease : # — 



* u The reports for 1893 are at present too few to be utilised 

 for this table." 



