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(1.) Excretion, or matter separated by animal bodies, and tbrown 

 off on account of tiieir noxious or effete qualities. Examples — 

 the urine, the dung, sweat, and carbonic acid gas from the lungs. 



(2.) Secretion is matter separated from the blood for further use, 

 and for the performance of various actions in the living system. 

 Example — bile, saliva, etc. 



Sedatives. — Medicines which lessen pain, and should, there- 

 fore, be called calmatives. Aconite is the most certain and 

 successful sedative and calmative we have to offer, and will seldom 

 disappoint the highest expectations, if used properly and in good 

 time. 



Serum. — The thin, colorless fluid, which separates from the 

 blood. 



Serous Abscess. — A variety of abscess seen usually about 

 the breasts of horses. It arises from injury followed by the pour- 

 ing of a serum from the blood into the injured part, which, not 

 being absorbed readily, remains there in the form of a large ovoid 

 flattened bag. A blind man, who never saw a tumor, could tell 

 that it contained fluid. Indeed, wherever dropsical swellings are 

 not absorbed, a serous abscess will be formed. 



Treatment. Open it with a knife, making a large opening through 

 the skin, only at the lowest soft part, so the serum will run out 

 without pressing. Inject once or twice with cold water, and 

 anoint the skin with lard to prevent it from cracking or becoming 

 dry. 



Seton. — A piece of tape placed under the skin by means of a 

 needle made for the purpose. Setons are rarely of use, and are 

 often torn violently out, making an ugly sore. 



Shivers. — So called because the horse is seized with tremor of 

 the muscles of the whole body, when any attempt is made to push 

 him back. The tail is erect as in cases of lock-jaw. 



Causes. Tumors on the ventricles of the brain. 



Shoeing of Sound Feet. — Most diseases of the feet, and every 

 stumble are, either directl}^ or indirectly, the result of bad shoe- 

 ing. Horse-shoers have long been in the habit of using the knife 

 and rasp too freely to keep feet sound very long so. When the 

 shoe is carefully removed, the wall or crust, where a well seated 

 shoe should only rest, should be gently rasped to remove frag- 



