268 THE farmer's VETERINARIAN 



such animals have tuberculosis. By this means a 

 sound herd of cattle may be developed from tuber- 

 culous animals. This method was introduced by 

 Prof. Bang of Copenhagen, and it has been found 

 to be very effective in Denmark and other countries 

 in Europe. It has been applied with much success 

 in a large number of individual herds in the United 

 States. Its success depends entirely upon the care 

 which is taken in keeping tubercle bacteria away 

 from the calves. 



In purchasing cattle for dairy or breeding pur- 

 poses it is important that they should be taken 

 from herds that are free from tuberculosis. The 

 sound herd is the unit to be dealt with. Animals 

 from such herds are far more reliable than non- 

 reactors from tuberculous herds. 



TUMORS. — Abnormal growths of tissues. There 

 are many kinds of tumors. They are named from 

 the kind of tissue of which they are composed, 

 as fibrous and fatty. Just why tumors should de- 

 velop is not known. Treatment is in the direction 

 of direct removal; this means they are to be cut 

 out with a knife. Another method is to tie a strong 

 cord around the stem of the tumor, thus shutting 

 off the blood supply. As soon as this is effected, 

 there will be a sloughing away, with a sore remain- 

 ing, which is to be treated as in an ordinary wound. 

 Some tumors are burnt off with caustics. Arsenic 

 or corrosive sublimate are commonly used, either 

 singularly or combined. Better consult a veteri- 

 narian about the removal of tumors on valuable 

 animals. 



TUMORS IN PIGS AFTER CASTRATION.— 

 Bunches form on the cords of pigs after castration 

 as a result of infection from dirty instruments or 

 hands during the operation; or from leaving the 



