1. In the account of his researches published in 1868 Villemin writes : " At first we were inclined to regard this difference as fortuitous, but subsequent experience led is to conclude that the tubercle of the bovine race inoculated into rabbits possesses a much greater activity than that obtained from man." Études sur la Tuberculose, p. 538.
2. Virulent, that is to say, for the calf, rabbit, goat, &c., for which animals the human type of bacillus has low virulence.
3. The camel in Egypt, like other domesticated mammals, when tuberculous, seems to be infected with a bovine type of bacillus (Mason).