4G TUBERCULIN, ITS HISTORY, PRKPARATION AND USE. 



IV. Take the temperatures every three hours from 6 a.m. 

 to 6 p.m. on the foUowinj^ day, or until there is no 

 further rise of temperature, and the normal level has 

 been resumed. 



USING THE THERMOMETER. 



The temperature of cattle, as well as all other of the lower 

 animals, is taken in the rectum. Before inserting the thermo- 

 meter by sure that the mercury stands below 97 degrees Fahr. 



With the left hand, firmly but gently grasp the animal's tail 

 about eight inches from its root ; lift it slowly just high enough 

 to permit access to the anus. 



The bulb and lower part of the thermometer may be 

 moistened with saliva, lard, glycerine, oil, or vaseline, to pre- 

 vent its sticking to the mucous membrane of the rectum. When 

 inserting the thermometer avoid catching the bulb in a fold of 

 mucous membrane by changing its direction either to the right 

 or left, or upward or downward as occasion requires. It has been 

 found that the thermometer is best introduced in an upward 

 direction. The thermometer should be pushed into the rectum 

 sufficiently far so that it can be easily withdrawn, and yet evade 

 the swinging motion of the animal's tail when the latter is 

 released. 



The thermometer should remain in position at least four 

 minutes. 



Iiijrctinij tlir iulirrniliii. — When the syringe is filled and the 

 proper dose set, the operator should take his place, if the animal 

 is in a bail, by the right shoulder of the animal, or on the side 

 opposite to that in which he intends to inject. Reaching over 

 the animal with the left hand, he must pinch the skin firmly at the 

 chosen point with the left thumb and forefinger. With the 

 syringe resting in his right palm, the needle between the thumb 

 and forefinger, he pierces the skin with a quick thrust, and 

 while retaining hold of the folded skin, the piston is taken Avith 

 the right thumb and the contents of the syringe slowly intro- 

 duced into the subsutaneous tissue. 



I'lic llt'dctioii. — It may be affirmed that an animal has 

 tuberculosis if its temperature rises 2'5 degrees Fahr., or more, 

 on the day following the injection. 



