54 DISEASES OF THE HORSE. 



over the swelling will be of use. Sometimes it will be 

 necessary to make slight incisions or cuts through the 

 skin to let out the imprisoned fluid. Do not blister such 

 swelling, as it is apt to produce ragged, running sores, 

 difficult to heal, and leaving a blemish. 



Water in the chest is removed by introducing an in- 

 strument (See Instruments,) called a trocar, but some- 

 Avhat smaller than the one used for lioven in cattle. 

 Also it is removed by absorption and by diuretics. 

 (Which see.) 



Dysentery. — (See Diarrhoea.) 



Ear Diseases. 



(1.) Small Tumors. — Sometimes tumors of various 

 shapes and sizes are seen in the ear of the horse, pro- 

 ducing a kind of canker in that organ. 



Symptoms. — Shaking of the head; will not let much 

 familiarity be made with it ; running or starting back, 

 when the collar or bridle is being taken up over the ears. 



Causes. — Irritation and inflammation of the skin of 

 the ear, producing small pimples of proud flesh. 



Treatment. — Removal with the knife, scissors, or caus- 

 tic; then apply the simple ointment as for a simple sore. 

 (See Prescription in Medicine list.) 



(2.) Injuries of the Ear. — Injuries to the ear 

 take place from the use of the whip, the bite of a dog, or 

 from another horse biting it. 



Treatment. — Treat as for a common sore, by simple 

 ointment and by cleanliness. 



(3.) Deafness. — Not often observed in horses. 



(4.) Foreign Substances in the Ear. — Remove 

 them by the forceps. 



