. A text-book of bacteriology. Bacteriology. IN SUSCEPTIBLE ANIMALS. 501 cubating oven a rather thin, transparent, grayish-white or yellowish, waxy layer is developed in the course of a few days. According to Bunzl-Federn, the bacillus of fowl cholera and that of rabbit septicaemia grow upon potato, while the bacillus of Wildseuche, Schweineseuche, and Biif- felseuche do not. According to Caneva, none of the bacilli of this group grow upon potato. The same author states that the growth in milk is scanty and does not produce coagulation, while Bunzl- Federn finds that the bacillus of fowl chole
. A text-book of bacteriology. Bacteriology. IN SUSCEPTIBLE ANIMALS. 501 cubating oven a rather thin, transparent, grayish-white or yellowish, waxy layer is developed in the course of a few days. According to Bunzl-Federn, the bacillus of fowl cholera and that of rabbit septicaemia grow upon potato, while the bacillus of Wildseuche, Schweineseuche, and Biif- felseuche do not. According to Caneva, none of the bacilli of this group grow upon potato. The same author states that the growth in milk is scanty and does not produce coagulation, while Bunzl- Federn finds that the bacillus of fowl cholera and of rabbit septi- caemia produce coagulation and the others do not. These differ- ences are not, however, consid- ered by the author last named as sufficient to establish the specific difference of the bacilli from these different sources. He looks upon them rather as varieties of the same species. Bunzl-Federn has also ascertained that when cul- tivated in a peptone solution all of the bacilli of this group, with the exception of that obtained from the so-called Buffelseuche, give the reaction for phenol and for indol—the bacillus of Buffel- seuche gives the indol reaction only. Development in bouillon is rapid and causes a uniform turbidity of the fluid. Cultures of this bacillus may retain their vitality for three months or more when kept in a moist condition; but the bacillus usually fails to grow after having been kept for a few days in a desiccated con- dition ; according to Hueppe, it may resist desiccation for fourteen days. The thermal death-point, as determined by Salmon for the bacillus of fowl cholera, is 56° C., the time of exposure being ten minutes (55° C. with fifteen minutes' exposure—Baumgarten). It is not readily destroyed by putrefaction (Kitt). A solution of mercuric chloride of 1 :5,000 destroys it in one minute, and a three-per-cent solution of carbolic Fio. 128. — Bacillus septicsemisB haenior- rhagicse; stick culture in nutrient gelatin, e
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