BOVINE TUBERCULOSIS. 
253 
sented a new bill which was passed by the Senate in 1899. In 
order that it may be effective it must pass the Chamber, where 
it may be opposed by a new Cledon amendment. The text of 
the law as adopted by the Senate is as follows : 
u Exhibiting or selling or offering for sale any animal af¬ 
flicted or suspected to be afflicted with a contagious disease is 
prohibited ; 
“ And if a sale has been made, it is of right null and void, 
whether or not the vendor had knowledge of the existence of 
the disease with which his animal was sfflicted or suspected 
to be ; 
“ However, no action on the part of the purchaser, by reason 
of said nullity shall be maintained, when more than thirty days 
in cases of tuberculosis, and more than forty-five days in cases 
of other diseases shall have elapsed since delivery, in the ab¬ 
sence of public prosecution.” 
This new law marks some progress, although the burden of 
proving the existence of the disease on the day of the contract 
is always on the vendor and there are no data to fix the period of 
incubation or the age of tubercular lesions. 
Messrs. Gallier de Caen and Eaquerriere have tried to 
remedy this by submitting to the Society of Practical Veteri¬ 
nary Medicine a proposed law requiring for contagious diseases 
a delay commensurate with their period of incubation and car¬ 
rying a legal presumption of anteriority. 
The society approved the principle of this proposed act, 
but difficulties arose when it became necessary to state the pe¬ 
riods of incubation of the various diseases. 
The Eaquerriere bill fixed the period of incubation for tuber¬ 
culosis as nine days, but the Society of Practical Veterinary 
Medicine did not agree with this act. 
The society at a meeting held the 9th November, 1899, de¬ 
cided that experiments should be made in order to determine 
the period of incubation of tuberculosis and also the age of 
tubercular lesions. 
Mr. Earedan, the President, when speaking on this ques- 
