We iave found that the normal temperature varies in 

 healthy cows from ioo° to 101.5° P. The average is about 100.5° 

 F. Any cow whose temperature is elevated by the injection 

 from i}i° to 2° F., is immediately removed from the herd and 

 placed in the isolation barn, and is retested with tuberculin at 

 the end of thirty days. In the interval a specimen is taken 

 from her dung and cultivated on egg media tubes, and exam- 

 ined for the tuberculosis germ. If the animal reacts and the 

 germs are found, she is killed. 



There are two other methods which have been proposed to 

 fihd out if a cow has Tuberculosis, with the technique of which 

 we are not familiar. One is the method of von Piquet, termed 

 the " Cuti " reaction, in which the skin is scarified and the tu- 

 berculin applied. The other is the method of the "Wolff-Eis- 

 ner and Calmette," termed the "Ophthalmo" reaction, in 

 which the tuberculin is applied to the eye. 



Perhaps these methods may be of use^ especially where the 

 ignorance of the owner of the herd objects to having his cows 

 tested by injections of tuberculin. Then, in such cases, any 

 method that will prove the presence or non-presence of the dis- 

 ease should be used. 



THE VALUE OF THE TUBERCULIN TEST. 



By the use of tuberculin an accurate diagnosis can be made 

 in over 97 per cent, of the animals tested. 



The Bureau of Animal Industry, of the United States Agri- 

 cultural Department, reports that in fifteen years, from 1893 to 

 to 1908, experiments by federal, state, and other officers with 

 tuberculin prepared by the Bureau of Animal Industry show 

 that out of 24,784 reacting cattle slaughtered, the disease of 

 Tuberculosis was found in 24,387, a percentage of 98.39. 



There are two classes of cattle where an error may be made 

 in diagnosis. 



The first class contains those that are tuberculous, but 

 which do not react either because of the slight effect of the usu- 

 ally prescribed dose of tuberculin, or an advanced case of the 

 disease with so much of the poison of Tuberculosis in her sys- 

 tem, or on account of a previous test with tuberculin having 

 been made within the last four or six weeks. 



