THIRTY-SEVENTH ANNUAL CONVENTION. 185 



after it is introduced. Take those temperatures again at inter- 

 vals of every two hours until there is a permanent decline. In 

 the case of a non-reacting animal about one and one-half de- 

 grees and in a reacting animal in ten hours it would begin to 

 go higher, perhaps to 105, 106 or even 107 degrees; it would 

 remain there for a while and then it would begin to go down. 

 Of course this takes some experience. For instance, conditions 

 might vary, if you should take a bunch of Jerseys, or, in fact, 

 any cows and take them out and let them take in a large quan- 

 tity of ice cold water, it would lower their temperature from 

 two to three degrees. 



Member: What is your opinion of the ocular test for 

 diagnosing tuberculosis ? 



Dr. Russell : There have been two or three different kinds 

 of tests. The gentleman speaks of the ocular system which con- 

 sists of taking a drop and dropping in the eye. Where that 

 test has been applied it has been found to be so sensitive that it 

 is not regarded as satisfactory, but it is as reliable as the sub- 

 cutaneous test; that test is sometimes applied to hogs. 



Member : Is the pasteur vaccine reliable ? 



Dr. Russell : The manufacturer of tuberculin by the U. S. 

 Government by Mulford, Alexander, Park Davis and others 

 who are interested in this work is all right. There have, how- 

 ever, been instances where this tuberculin that has been made 

 by these proprietory concerns has been found to be impotent. 

 Several years ago a large quantity was found to be of no value. 

 I know of no case within the last two or three years. We use 

 that which we make ourselves, but Phave no reason to believe 

 but what the pasteur is as good as these others. 



Member : What is your experience of the Bang system of 

 testing reacting animals? 



Dr. Russell : The Bang system rests upon this fact, a 

 tubercular animal will drop a calf perfectly healthy. There are 



