490 Veterinary Medicine. 



where it was. It is well to test each calf at six weeks old and to 

 remove the reacting ones. The success of this method is now 

 well established. 



Goodman, of Dorpat, applied it largely as early as 1891, rear- 

 ing the healthy calves of reacting cows on the milk of cows that 

 had stood the test. Bang, of Denmark, raised such calves to 

 sound maturity on sterilized milk. Reynolds, of Minnesota, re- 

 ports the raising of twenty-four healthy calves from infected cows 

 on the milk of tested cows, while three fed on milk of reacting 

 cows, which was supposed to be sterilized, all became tubercu- 

 lous. McEachran (1899) in an extended experiment succeeded 

 perfectly with the milk of tested cows only. I have now in hand 

 a Jersey herd in which the progeny, fed on the milk of their react- 

 ing dams, became tuberculous without exception, and in the years 

 following, those fed on the milk of the same reacting cows after 

 it had been kept at 180 F. for half an hour all grew up healthy. 



Under this method, inasmuch as the infection is not at once ex- 

 tinguished, but temporized with for the benefit of the stock 

 owner, State indemnities are not necessarily called for. Yet the 

 State can profitably test the cattle at public expense, mark indel- 

 ibly those that react, schedule them and control them, so that 

 they will not be allowed to change hands nor to mingle with 

 sound animals until finally butchered, dead or recovered. The 

 State should see to the thoroughness of the seclusion, disinfec- 

 tion, the safe disposal of all products from milk to manure, and 

 the testing at intervals of three or six months of both cows and 

 calves. 



Raising Healthy Offspring Without Sterilizing the Milk. In 

 the northwest territories cows and heifers that have reacted to 

 tuberculin, but which otherwise appear to be in good health, are 

 made into a herd by themselves and placed on a special range 

 apart from all other cattle. They live in the open air, slight 

 shelter being allowed in winter only, and their calves are allowed 

 to suck the dams until winter. The wide range, the open air 

 life, and the early destruction by oxygen and sunshine of the dis- 

 charged bacilli, tend in the main to ward off infection, except such 

 as comes in the milk, and the majority of the calves grow up in 

 apparent health and are fattened for market. A small minority 

 are born tuberculous or contract the infection from the milk, but 



