20 Bulletin 150. 



the body temperature usually rises two or three degrees, and if 

 tuberculin has been used tliis rise may be attributed to tubercu- 

 losis and a sound animal may be condemned. Nor is it always 

 enough that the animal is supposed to be pregnant. Abortions 

 sometimes takes place unexpectedly and unknown to the owner. 

 If, therefore, a cow under the test and which is not well advanced 

 in pregnancy should show a rise of temperature it should be at 

 once ascertained whether the animal is not in " heat." If sym- 

 toms of ' ' heat ' ' are found she should be set aside along with any 

 calving cows to be tested again when such a source of error is no 

 longer present. 



4th. Tlie tested animal imist not be exposed to a hot sun 171 a 

 closed aj-ea. In excess this will cause heat apoplexy, and the 

 fever heat which ushers this in may easily be mistaken for the 

 indications of tuberculosis. 



5th. Cattle taken fro )n pastures must 7iot be enclosed in a hot, 

 stuffy stable. While they must be tied up to allow of the tem- 

 peratures being taken at short intervals, coolness and ventilation 

 should be secured in summer by a sufficient air space and the re- 

 quisite ventilating openings. 



6th. Exposure to cold draughts between open doors ajid wi^idows, 

 or to wet or chilly blasts out of doors should be carefully guarded 

 against. A chill proceeding from an}^ source and alike in the 

 presence or absence of tuberculin causes a rise of the internal 

 body temperature. 



7th. Heavy cows unacctistomed to stand on hard boards may 

 have a rise in temperature in connection ivith resulting teiiderjiess of 

 the feet. One must avoid hard floors on the day of the test or 

 make examination of the feet and allow for attendant fever. 



8th. Omission of the p7'evious milking or a -change of inilker and 

 consequeiit rete7itio7i of pa7't of the 77iilk will raise the temperature 

 of a nervous cow, and in careless hands secure an erroneous con- 

 demnation. 



gth. Privation of water at the regular ti77ie will ofte7i cause 7^ise 

 of teniperature especially when on the dry feeding of winter. I 

 have seen a general rise of two degrees and upward from the 

 dela}^ of watering for a single hour, while after watering the 

 temperature went dow^n to the normal and remained so. Water 



