154 DISEASES OF THE HORSE. 



hydrogen and carbon for oxygen. The air being brought 

 in contact with the blood, as it circulates through the 

 lungs, the oxygen unites with it, and the nitrogen and 

 carbonic acjd gas is returned by expiration. The oxygen 

 and some of the inhaled air is united in the lungs with 

 free hydrogen, which is given out from the lungs, and is 

 readily seen issuing from the nostrils on a frosty morn- 

 ing, or when the thermometer is about 40°. 



Revulsion. — A second attack of disease, but in a re- 

 mote or different part of the body from which the first 

 attack had its seat. Example: — if an eruption, or the 

 abscess of strangles be repelled from the outside of the 

 body, we will find it attacking an internal organ. (See 

 Metastasis.) 



Rheumatism* — In no disease of -ihe horse are there 

 so many errors and mistakes committed; not only as to 

 the nature of the affection, but its mode of treatment. 

 Horsemen and horse doctors have not yet learned that 

 there is a difference, and how to distinguish rheumatism 

 from FOUNDER, whether acute or chronic. The differ- 

 ence between acute or inflammatory rheumatism, and 

 acute founder, is this: — in rheumatism there is not only 

 pain, but great fever and excitement; and its seat is in 

 the joints of the legs ; in founder, we have pain, but no 

 fever; and the disease is confined to the feet alone. (See 

 Lamenitis.) 



In chronic rheumatism there may be some excuse for 

 such mistakes, as there is no fever ; but there is an ina- 

 bility to move, as if the horse was sprained over the loins. 

 (S'ee Lumbago.) 



(1.) — Acute Rheumatism — Is nothing else but w^hat 

 is called (when man is the subject,) rheumatic fever. 



Symptoms, — Great fever, excitement, and irritation, 



