IK) EXPERIMENT STATION RECORD. 



huiiiuii lyinpliiitic elands and liuiiiaii sputum which proved to he 

 oxcoediii<;ly \ iruhMit for cattle, ooats, rabbits, and otlier experi- 

 mental animals. The conclusions were reached that tuberculosis is 

 nmtually transmissible between man and animals; that the bacilli 

 may pass tiirouyli the walls of the intestines without cau.sing any 

 lesions in the intestin(\s; and that the \ ii'ulence for cattle of the Ixicilli 

 fi-om some of tlu^, cases of infantile intestinal tuberculosis o-ivo stronu- 

 evidence of the transmission of th(^ disease from animals to man. 

 The orc'at Aariety of wa3"s in which man may l)ecome infected makes 

 it absolutely impossible to determine by clinical obser^■ation the source 

 of infection in any case of human tuberculosis. 



In the protracted discussion which followed the i-eadiny- of these 

 two papcu's, the consensus of opinion of the association appeared to 

 be that a practical method for the control and eradication of tubercu- 

 losis has been foimd, and that the positive assertions of Koch as to 

 the nonidentit}' of luunan and bovine tuberculosis has beiui detiniteh' 

 disproved. Attention was repeatedly called to the danger from a 

 laxitv of opinion Avith regard to the intertransmissibility of bovine 

 and human tuberculosis. 



J. J. Repp read ti paper on a microscopic study of a case of tuber- 

 culosis in a cow, with reference to the distribution of bacilli, which 

 was illustrated with lantern slides. The tissues examined included 

 those of the heart, liver, intestine, lung-, and mediastinal gland. 

 Tubercle bacilli were very numerous in the ulcers in the intestinal 

 mucosa. The villi and glands of Lieberkiihn were entirely obliter- 

 ated in the intestinal ulcers. It was suggested that large numbers of 

 bacilli must have been constantly passed with the feces, and that these 

 nmst ha\'e constituted a dangerous source of infection. The heart 

 capillaries were nuich thickened, but no bacilli were found in the 

 muscles of the heart or of the intestines. No g-iant cells were 

 observed in the tuberculous lung tissue, 



V. A, Moore, of New York, discussed Avian Tuberculosis, on the 

 basis of investigations made in California, where the disease was found 

 to be very prevalent, and gave brief notes on the literature of the 

 subject from studies made in Oregon, Delaware, and Michigan. The 

 disease was found to be graduall}' increasing' in infected tlocks. 

 According- to the author's investigations in California, from 5 to 20 

 per cent of the fowls die annually from tuberculosis. In one flock 

 of 1,450, 300 died from this disease. The symptoms were not char- 

 acteristic. Anemia and paleness of the visible mucous membranes 

 were generally observed. The temperature varied from 102 to 107^. 

 The blood was pale, showing 2,000,000 red corpuscles per cmm., with 

 an increase of the leucocytes. The lesions were found most frequently 

 in the liver, which was sprinkled with gray tubercles, thus givmg the 

 disease the common name of ""spotted liver." Immense numbers of 



