DOMESTIC ANIMALS. 129 



the right. In figure 39, we have a good picture of the 

 appearance of a horse suffering with this disease. Al- 

 though the most prominent symptom is the localized 

 inflammatory swelling, it is undoubtedly a constitutional 

 disease, in which the blood is surcharged with the tissue- 



Fig. 39. Appearance of horse with Lymphangitis. 



forming element known as lymph, and containing an 

 excess of white blood cells. % 



Causes. Over feeding at a time when there is a 

 want of sufficient exercise to use up elements that are 

 carried into the circulatory system. An overflow is na- 

 ture's remedy for such crowding. The circulation being 

 weakest in the hind limbs, the exudate of white cor- 

 puscles and watery parts of the blood takes place in 

 this locality. 



/Symptoms. The most prominent and diagnostic, is 

 the swelling of one or more of the limbs. This is fre- 

 quently so sudden that the limb is swollen to double 

 the natural size over night. There is a considerable 

 ripe of temperature, the pulse is quickened, and the res- 

 9 



