190 BOARD OF AGRICULTURE. [Pub. Doc. 



about, we put into the herd. There was a boiler in the 

 barn. They attached a pipe to the boiler and went into 

 the stable with live steam until the planks warped right out 

 of place. After that we whitewashed it with a solution of 

 bichloride of mercury. Nothing has been done since, with 

 the exception of keeping it ordinarily clean, and the disease 

 has not appeared since. 



Mr. Peatt. How long since you made the last test? 

 ■ Dr. Osgood. About three weeks. 



Question. How much variation of temperature do you 

 allow in order to satisfy you that an animal is diseased ? 



Dr. Osgood. That would depend on the physical condi- 

 tion. If an animal in apparently poor physical condition 

 had a variation in temperature of one degree, we would con- 

 demn it. If it were a fine-looking animal, and had every 

 appearance of health, we would put it one side for a future 

 examination. 



Question. Does the difference in temperature indicate 

 the extent of the disease ? 



Dr. Osgood. No ; unfortunately, it does not. In the 

 case of infection in an animal in the best physical condition, 

 we get the highest reaction. When we get a reaction run- 

 ning up to one hundred and seven, we almost always look for 

 very slight lesions when we kill the animal. In the most 

 advanced cases we get the least reaction. A deviation of 

 one degree would, perhaps, be satisfactory. 



Question. How many hours after the injection of tuber- 

 culin do you wait ? 



Dr. Osgood. We make an inoculation at night, and 

 ten hours after inoculation we take the temperature ; then 

 every two hours up to the twentieth hour, provided there 

 has been no reaction before. If it has been completed 

 before that time, we do not continue to take the tem- 

 perature. If it is negative, we continue up to the twentieth 

 hour, because we may get a reaction at the eighteenth or 

 twentieth hour. 



Mr. . I would like to have you give your opinion 



in regard to this : there is a herd, for instance, that is 

 diseased, but not what we would call badly so ; that herd 

 is scattering its product all over the country, in butter, 



