1902.] DISCUSSION. 275 



Prof. Phelps. As Prof. Atwater has indicated, this work 

 with tuberculous cows and their progeny, and other young 

 stock that were associated with them, was closed out about 

 a year ago. We had those tuberculous cows under obser\-a- 

 tion some four years, we had associated with them some of 

 their offspring, and a part of that time we had associated with 

 them the offspring of other cows that were perfectly healthy 

 so far as tuberculosis was concerned, so far as could be 

 determined by observation. We fed the offspring of those 

 cows and other stock the milk of those tuberculous cows. In 

 most cases the offspring that was fed with this milk and the 

 other young stock that was so fed thrived and grew and were 

 healthy animals, and were sold in som.e instances to butchers, 

 and some of the stock was sold off as working oxen. In two 

 cases, I think, we sold off some young steers from that stock. 

 In one instance a cow, the offspring of one of the older ani- 

 mals, was kept at the college and placed in the dairy herd, 

 and kept there for two or three years, or kept there until she 

 proved that she was not a very valuable animal, and we dis- 

 posed of her. There were other instances, especially in the 

 latter part of the four years period, during which we fed the 

 offspring of these cows and other young animals, where, in the 

 course of five or six or seven months, they developed signs of 

 the disease according to the tubercuhn test. We observed 

 this particularly within the first two years of the four years that 

 we kept those cows, — four in number. The animals re- 

 mained in an apparently healthy and vigorous condition. They 

 continued to give a good flow of milk, and they remained fat 

 and sleek, and were to all appearances perfectly healthy. Dur- 

 ing the third year one of the animals began to show signs of 

 physical dechne, and during the fourth year two more of the 

 animals declined. The one that began to show signs of de- 

 cline in the third and in the fourth years grew decidedly bad, 

 and at the end of the four years one of the animals was in such 

 bad condition that it could not have lived but a short time. 



