2 82 VETERINARY LECTURES 



432. The Right Lymphatic Vessel is a receptacle for the lymph 

 that is taken up by the absorbents on the right side of the head, neck, 

 thorax, and right fore-leg, and it empties itself into the venous blood- 

 stream near the heart, generally at the confluent vein of the jugulars. 



PART III 



DISEASES AND DISORDERS OF 

 THE CIRCULATORY AND LYMPHATIC SYSTEMS. 



433. Heart Diseases.— These, though of frequent occurrence 

 in the human subject, are not so common in the horse. The cow, 

 however, is more often affected, generally with traumatic heart 

 disease, from foreign bodies, such as pins, needles, etc., finding their 

 way to the heart from the stomach. Heart affections may be said to 

 be of two kinds — (1) functional, and (2) organic. 



434. Functional Derangement of the Heart in the horse 

 arises from a variety of causes, but is mainly due to some stomach or 

 liver disorder, the nature of which should, if possible, be ascertained 

 and suitable treatment adopted. In these cases the pulse is, as a 

 rule, very irregular and intermittent. The animal is very dull, 

 hanging its head and breathing slowly, and is off its food. The under 

 side of the eyelid and the mouth is also of a dirty yellow colour 

 and foul, the mouth and tongue being coated with thick mucus. 

 When these symptoms are observed, the following medicine usually 

 gives great relief : 1 drachm of calomel and 2 drachms each of 

 powdered aloes and powdered rhubarb, made into a ball with a little 

 treacle, followed up by J-ounce doses of bicarbonate of soda, night 

 and morning, in a mash. The above treatment is for an ordinary 

 adult agricultural horse ; for other classes of horses the dose must 

 be regulated. Functional derangements of the heart may also be 

 due to some obstruction in the bloodvessels. 



435- Organic Disease of the Heart.— In the heart of the 

 horse some of the following changes are at times seen, such as 

 vascular fibrinous and bony tumours in the cavities, and sometimes, also, 

 attached to the valves of the heart, all of which have generally a 



