l66 MAINE AGRICULTURAL EXPERIMENT STATION. 



calves at from six to eight weeks old, and when killed were 

 carefully examined. One of the pigs and two of the calves 

 were found to be tuberculous. 



The first of the calves to be found diseased was a black calf 

 purchased when it was three days old. out of an apparently 

 healthy cow. It was killed June 3, 1897. when three months 

 old. It was kept to this age because of difficulty in getting a 

 calf to take its place to use the milk. It grew rapidly and was 

 very large and fat when killed. Had never shown symptoms of 

 disease. Had been tested with tuberculin three times, the last 

 time May 6, 1897. but did not react. The autopsy revealed 

 many small tubercles in the liver, one tubercle one-half inch in 

 diameter in the lungs, and three lymphatic glands slightly dis- 

 eased. A guinea pig was inoculated from a piece of the lung 

 tubercle and died July 17, 1897, from general tuberculosis. 



The second calf that was found tubercular was dropped by 

 Kate. April 21, 1897, and was never outside of the barn where 

 it was dropped. It will be noticed from the autopsy of Kate 

 that she was found very slightly diseased. May 14 this calf 

 was tested with tuberculin and reacted with a maximum tem- 

 perature of 105. °4. May 19 it was tested again and reacted 

 with a temperature of I04°.2. June 25 it was tested again and 

 failed to react. June 29, 1897, this calf was killed. It had 

 always seemed well and was very fat when killed. The autopsy 

 revealed four mediastinal lymphatic glands which contained a 

 large number of small yellow foci each about the size of a pin 

 head and calcareous. The glands were perceptibly enlarged. 

 A guinea pig inoculated with a piece of one of these glands died 

 September 1, and was found to have general tuberculosis. 



The hog that developed tuberculosis while being fed on milk 

 from the tuberculous cows was one of two that were kept for 

 nearly a year in the basement of the stable where the cows were. 

 They had access to the manure from the cows. When killed 

 December 3, 1897, this hog was about fifteen months old. Had 

 always appeared well. The autopsy revealed tuberculous 

 lesions in the liver and lymphatic glands. Xo tuberculin test 

 had been applied. 



