334 THE STOCK owner's ADVISER. 



where the secretions of the mucous follicles of the air passages are 

 increased. 



The dry cough is usually present during the early stages of 

 catarrhal affections, as in pleurisy, etc. 



The thermometer is a great aid to diagnosis. The animal 

 body is so constituted that neither heat nor cold will have any 

 material influence on the temperature until vitality has ceased. 



The temperature of the body in the internal parts of the horse 

 is from 99 to 102° F. In young animals the temperature is 

 generally 102, while in very old animals it is as low as 97 or 98°. 

 The surrounding atmosphere may cause some variation in tem- 

 perature. The method of taking the temperature of the body in 

 the lower animals is by introducing a properly registered ther- 

 mometer into the rectum. 



Many practitioners use their hand in the animal's mouth and 

 on the rectum to ascertaiu the amount of abnormal heat present. 

 But there are cases where only the properly registered thermome- 

 ter can be admitted. The method of measuring the heat by the 

 thermometer holds a highly important position, not only in cases 

 of illness where symptoms are present, but more particularly in 

 the incubative stages of contagious or infectious diseases. The 

 straight thennometer is the best instrnment to use. It should be 

 kept in the rectum three minutes, and may be tried twice. 



