29S ANNUAL REPORT OP THE Off. Doc. 



this to show you how essential it is to take the temperature at regu- 

 lar intervals from the moment of injection right straight through to 

 the twenty-fourth hour, and then some more if you can. 



Every owner of cattle, every herdsman should become familiar 

 with the use and readings of a- thermometer, and they should con- 

 tinue the temperature findings, to be absolutely certain, right along 

 every two hours after injection, do it themselves if the veterinarian 

 does not do it. The veterinarian must sleep, you know, but in the 

 intervals you can take the temperature and I want to cite an in- 

 stance that happened. I directed a veterinarian to test some cattle 

 and he came back after taking the temperatures up to the eighteenth 

 hour, or he telephoned me — that is the regular requirement in our 

 State, up to the eighteenth hour. There were circumstances sur- 

 rounding these cattle which were such that T wanted to be ab- 

 solutely sure about it, and I wanted them taken up to the twenty- 

 fourth hour, so that I had to ask the owner of the herd to take 

 the temperatures himself. He was a good, practical man, had often 

 bought cattle and made the test himself and was in position to 

 judge whether the test was made right, and he did it and we got 

 a generalized case on the twenty-second hour; the temperature be- 

 gan to rise the twenty-second hour; he took it the twenty-fourth and 

 twenty-sixth hour and it stayed up about two hours and a half, and 

 we slaughtered the cow and it was a case of generalized tuberculosis. 

 I simply want to show you, but this illustration, that where an ani- 

 mal is saturated with tuberculosis and tubercular products, that it 

 places that animal in an immune condition so that it offsets the 

 fact of our injection, our ordinary injection of tuberculin. 



Now those are the cases we might miss. And there was a cow 

 that to all appearances was a perfectly healthy animal and she was 

 in that herd, capable of spreading the disease. Now we will imagine 

 that you have picked out all your reactors and you have gotten rid 

 of them. 



Now the next tiling to do, and in my mind the hardest proposi- 

 tion, is to keep out the seed of tuberculosis. You must remember 

 that vou must liken this seed or this organism to anv other seed 

 or organi.«;m; it can be carried around, it can be carried by the 

 wind, it can be carried by the manure, it can be carried by hoffs, by 

 chickens, by anything that moves or is moved which has come in 

 contact with the specific cause of the disease. You have many in- 

 stances of that in the agricultural line, as far as the moth is con- 

 cerned, for example, and a few other of those vegetable parasites. 



ADDRESS OF MR. STEVENSON. 



You know I can't even get under way in five minutes. I have no 

 desire to hold anybody against their will; but T think this question 

 is of such importance to the breeders of cattle, that we ought to take 

 a night, if necessary, in order to acquire any information about it 



