EXPERIMENT STATION BULLETINS. 



637 



TABLE VI.— HISTORY OF MILK FROM A COW WITH A RECORD OF FREQUENT 



ABORTIONS, (a) 



(Agglutination reaction at middle of milking, when various quantities of milk were added to test tubes 



containing bacterial suspension.) 



(a) Known abortions: Dec, 1909; Jan., 1914. Jan., 1911, last living normal calf. Other records 

 of abortions lost. 



(b) Isolated a pure culture of Bact. abortus direct from milk. 



(c) Guinea pigs inoculated intra-abdominally with milk from each quarter had typical Bad. abortus 

 lesions when autopsies were performed eight weeks later. 



(d) Died; impaction of stomach. No lesions'or abnormal conditions found in udder. 



In Tables VII and VIII the records of milk from two additional cows 

 are given. Here again we have positive agglutinations coupled with 

 abortions and milk shown to contain Bact. abortus by guinea-pig inocula- 

 tion. 



TABLE VII.— HISTORY OF MILK FROM A COW WITH A RECORD OF FREQUENT 



ABORTIONS. 



(a) Guinea pigs inoculated intra-abdominally with milk from each quarter had typical Bad. abortus 

 lesions when autopsies were performed 10 weeks later. 



(b) Aborted a 7-month fetus. 



(c) Right rear quarter, positive guinea-pig Inoculation. Right front quarter lost, and left rear 

 and left front quarters negative. 



(d) Aborted a 7-nK)nth fetus. 



