342 SCIENCE PROGRESS. 



of the mesenteric glands were affected, and from these the 

 disease spread to the glands of the lesser omentum, to the 

 liver and spleen, to the posterior mediastinal glands, and finally 

 to the lungs, which were the seat of caseating miliary tuber- 

 culosis. This case is instructive, inasmuch as it reproduces, 

 almost exactly, some of the cases of feeding tuberculosis 

 occurring naturally in human beings. The local lesion of 

 the intestine is out of all proportion to the tuberculosis 

 resulting in the rest of the body, and especially in the 

 lungs. In children such cases are not infrequently seen, 

 and indeed the ulcer in the intestine may heal, or the 

 mesenteric glands become calcareous, so that unless care- 

 fully examined the disease may appear as one of primary 

 lung tuberculosis. 



The results of feeding pigs with non-virulent tuberculous 

 material, namely, with meat and milk, may now be con- 

 sidered. The first case was that of a pig fed with twelve 

 litres of slightly virulent tuberculous milk. It was killed in 

 sixty-eight days, and tuberculosis of the mesenteric glands 

 alone was found. There was no local lesion in any part of 

 the alimentary tract, and no affection of any gland or organs 

 other than the mesenteric glands. 



In another case a pig was fed with about four kilograms 

 of meat from a tuberculous cow, and was killed in 106 days. 

 In this case also there was no lesion in any part of the 

 alimentary tract, but the cceliac glands were tuberculous, as 

 well as the lymphatic glands on the right side below the 

 angle of the jaw, and both the liver and spleen showed 

 scattered nodules of caseous tubercle. All the other organs 

 and glands of the body were normal. The channels of 

 infection in this case were, therefore, through the right 

 tonsil into the neighbouring lymphatic gland and through 

 the upper part of the intestines into the coeliac glands, from 

 which the liver and spleen were affected. 



The third case occurred in a pig fed with 1 190 grams of 

 meat from a tuberculous cow. It was killed in 203 days, 

 and, as in the other two cases, there was no local lesion in 

 any part of the alimentary tract. The coeliac glands and 

 those in the lesser omentum were tuberculous, as well as the 



