T)ioesti(jiitluiis ill 1888 /w/' llie Iloijal Agricidtural Society. 325 
be exhibited in the ordinaiy food of the pig in such a manner 
as to protect the animal from an attack of the natural disease. 
Cultivations of the organism which is asserted to be the 
specific cause of swine fever were mixed with sterilised broth 
and given to pigs without result. All the'animals died of swine 
fever when they were exposed to infection by being put into an 
infected sty. ]\Iixtures of the active virus taken from the spleens 
