264 CONTAGIOUS DISEASES. 



reappeared), and presented them to affected stallions which had 

 been brought for the purpose from the Depots de Tarbes, where 

 the disease was then raging. Five of these mares became affected 

 to a slight degree, the disease disappearing spontaneously. Five 

 others became seriously affected, one of which only recovered ; 

 thus showing that five only entirely resisted, while four suc- 

 cumbed to the disease. 



Other experiments could be related, but I think the above is 

 quite sufficient to show that its transmission during the act of 

 copulation is undeniable. 



It is, however, just to observe that numerous experiments by 

 inoculation were conducted without result, before the contagion 

 was denied. 



M. Hering, notwithstanding, succeeded in one instance in 

 producing the disease by rubbing the mucous membrane of the 

 vagina with the virulent matter. 



It is worthy of remark that stallions offer more resistance 

 to the contagion than mares. — (M. PtEYNAL.) 



POST MORTEM APPEAEANCES. 



Tlie post mortem appearances with regard to the genital organs 

 do not coincide in different subjects. The lesions of the external 

 organs and of the mucous membrane are, however, constant. 



The sheath, when cut into, presents the appearance of a hard, 

 homogeneous, yellow tissue, but on a closer examination the 

 fibres of the areolar tissue may be distinguished, and between 

 them the serosity which gives the appearance indicated. 



The penis is partly protruded from the sheatli, and slightly 

 infiltrated towards its free extremity. On its external surface, 

 though very rarely, small whitish elevations, formed by the infil- 

 tration of a small quantity of serum under the epithelium, have 

 been observed. Small dried coagula of blood, which give the 

 ecchymosed appearance mentioned in the symptoms, have also 

 been encountered ; but the mucous membrane offers no other 

 alterations than a slight protrusion, a thickening, and a yellow- 

 ness in colour. 



The mucous membrane of the vesiculge seminales is said by 

 some to offer a red or violet appearance, containing a yellowish 

 thick matter of a purulent aspect ; by others, the vesiculae semi- 



