27 



virus of the disecase. 2. That the virus is present whether 

 there is disease of the udder or not. 3. That there is no 

 ground for the assertion that there must be a lesion of the 

 udder before the milk can contain the infection of tubercu- 

 losis. 4. That, on the contrary, the bacilli of tuberculosis 

 are present and active in a very large proportion of cases in 

 the milk of cows affected with tuberculosis but with no dis- 

 coverable lesion of the udder." 



Among other feeding experiments a litter of twelve healthy 

 pigs, born of healthy parents, were fed with the milk from 

 cows that had been used for experimenting in other direc- 

 tions ; and, out of these twelve pigs, five showed tuber- 

 culosis, — that is, almost fifty per cent. Also twenty-three 

 calves were used for feeding experiments. Calves that were 

 born of healthy parents were taken before they had had milk 

 from other sources at all, within twenty-four hours of the 

 time of their birth, and placed upon the milk of these cows ; 

 and, of these, eight became tuberculous by the feeding 

 experiments. 



Reference Works. 

 The attention of the readers of this article is called to the 

 following works: "Tuberculosis in Cattle," Dr. F. S. 

 Billings, "Agriculture of Massachusetts," 1885; "Tuber- 

 culosis," Dr. Wm. Holbrook, "Agriculture of Massachu- 

 setts," 1889; " Tuberculosis," Dr. C. H. Fernald, Bulletin 

 No. 3, Hatch Experiment Station of the Massachusetts Agri- 

 cultural College, January, 1889 ; " How far may a Cow be 

 Tuberculous before her Milk becomes Dangerous as an Article 

 of Food?" Dr. II. C. Ernst, Bulletin No. 8, Hatch Experi- 

 ment Station of the Massachusetts Agricultural College, 

 April, 1890 ; " Dangers to Human Life from Bacilli of Tuber- 

 culosis in Milk," hearing before legislative committee on 

 public health, February, 1891, issued by the Massachusetts 

 Society for Promoting Agriculture ; " Propagation of Tuber- 

 culosis," Lydtin, Fleming, Van Hertsen ; " Bovine Tuber- 

 culosis in Man," Dr. Charles Creighton, London, 1881; 

 "Annual Reports of Massachusetts Cattle Commission for 

 1889 and 1891," printed in the "Agriculture of Massachu- 

 setts " for 1888 and 1890. 



