346 MANUAL OF FARM ANIMALS 



necessary. This syringe should be provided with short, stout 

 needles, well reenforced at the base. 



Any druggist will procure the syringe and needles and show 

 how to use them. 



3. Thermometer. — A guaranteed clinical thermometer is 

 necessary. If a large number of animals is to be tested, it will 

 facilitate matters to provide two or three thermometers. Any 

 druggist will provide a thermometer and show how to adjust 

 or shake down and how to read it. A string should be tied 

 around the thermometer, at the other end of which should be 

 fastened a wire hook, or a small bull-dog clamp. After inserting 

 the thermometer in the rectum, the clamp or wire hook is fastened 

 to the long hairs at the base of the tail, or the wire wound around 

 the tail so that if the thermometer is thrown out, it will not be 

 broken by dropping to the ground. Cows are likely to void dung 

 soon after the insertion of the thermometer, and unless this 

 precaution is taken, the thermometer is very likely to drop to the 

 floor before many temperatures are taken. 



4. Disinfectant. — A small bottle of strong carbolic acid 

 (95 per cent) , to be used in disinfecting the syringe before begin- 

 ning the test and to disinfect the needle-point before injecting 

 each animal, is essential. This can be procured at any drug 

 store. 



5. Vaseline. — A small can of vaseline or lard should be pro- 

 vided to grease the thermometer before insertion. A vaseline 

 jar also affords a safe and convenient place to keep the ther- 

 mometer between times of taking temperature. 



Directions for making the tuberculin test. — While making the 

 test is not difficult (in fact easier done that told), one should 

 be exceedingly careful, going about the work methodically 

 and keeping everything neat and clean. The test may be 

 divided for convenience into five essential parts: (1) keep- 

 ing records, (2) taking the normal temperature, one day, 

 (3) injecting the tuberculin same day, (4) taking temperature 



