BOVINE TUBERCULOSIS. 
251 
ORIGINAL ARTICLES. 
BOVINE TUBERCULOSIS. 
PERIOD OF INCUBATION—AGE OF LESIONS — EXPERIMENTAL 
RESEARCHES. 
By MM. Nocard and Rossignol. 
Translated for the Review by J. F. Winchester, D. V. S., Lawrence , Mass. 
REPORT OF THE EXPERIMENTS MADE TO DETERMINE THE 
PERIOD OF INCUBATION IN BOVINES AND THE AGE OF 
TUBERCULAR LESIONS. 
By MM. Nocard and Rossignol. 
To the Minister of Agriculture, the Presidents and Members of the Conseils Generaux 
of Seine, Seine et Marne, Seine et Oise, of the Agricultural Societies of Fontaine¬ 
bleau, Melun, Versailles and of the Society of Practical Veterinary Medicine. 
Gentlemen :—In presenting our report we desire at first to 
state the reasons why the experiments which have been recently 
conducted at Pouilly le Fort and Alfort were undertaken, before 
giving the details of them. 
Since 1888 our sanitary laws prohibit the sale of tuberculous 
cattle ; but the traffic in such animals continued and the buyer 
was unable to get any redress, it being impossible for him to 
prove the existence of the disease at the time of purchase. 
The experts whose duty it is to examine the diseased animals 
cannot give a categorical statement of any case, since they are 
without knowledge of‘the period of incubation of tuberculosis 
or the age of tubercular lesions. 
On July 31, 1895, on the motion of M. Darbot, Parliament 
passed an act amending the laws of July 21, 1881, and August 2, 
1884, relative to the sales and exchanges of domestic animals. 
This act tended to prevent in a more efficacious way than 
before the sale of animals afflicted with contagious diseases ; 
unfortunately M. Cledon introduced the following amendment 
to the Darbot bill : 
“ However, in cases of tuberculosis in the bovine species, the 
