As tuberculosis cannot be readily detected by a physical examination until the disease is far advanced in the organs affected, it is necessary, in order to determine which animals have the disease, to apply some test or to find the germs of the disease in their excretions. The simplest test that has thus far been discovered is the action of tuberculin. When tuberculin is injected under the skin of the animals affected with active tuberculosis the animals respond by a rise of temperature, which follows a somewhat definite curve. By means of this test it is possible to pick out the infected individuals so that they can be separated from the healthy ones. The test should be repeated in from six months to a year in order to detect any new cases which might have developed from latent or arrested ones. We cannot always get all of the infected animals with the first test any more than we can always remove every weed from the garden by one hoeing. =The Bang Method for the Control= of tuberculosis consists in separating the animals that are infected from the well ones and keeping them for breeding purposes. The calves are removed from their dams as soon as born and fed with the milk of healthy cows, or the pasteurized milk of the infected ones. It has been found that but a small percentage of calves that are raised under proper precautions from such animals have tuberculosis. By this means a sound herd of cattle may be developed from tuberculous 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 purposes 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 develop 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 remaining, 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 veterinarian about the removal of tumors on valuable animals.