02 THE DISEASES OF THE HOKSE. 



complish this purpose. When practicable, setons in the 

 fistulous canals will not only keep the apertures open, but 

 will aid healthy granulation. Carious bone, cartilage, or 

 ligament should be removed. 

 Remedy. — See 'Fistula.' 



FISTULOUS PAROTID DUCT 



Is rare. It is a sinuous opening, communicating with 

 the interior of the duct, through which saliva is dis- 

 charged, especially during mastication. In chronic cases 

 the duct becomes so enlarged by the accumulation of saliva 

 that, instead of being comparable to a goose quill, it will 

 admit the finger. The situation of the fistula may be the 

 angle of the bone, the inner border of the jaw, or the 

 side of the cheek. The discharge of saliva proclaims the 

 nature of the case. The causes of the disease are abscess 

 of the gland, strangles (the disease), and injuries of all 

 kinds. 



Remedy. — Percivall cured two cases with the follow- 

 ing injection : Lunar caustic, \ dram ; nitric acid, 1 

 dram; distilled water, 1 ounce. Judging by experience, 

 he recommends that the quantity of water be doubled. 

 In the second case treated by him, the gland was de- 

 stroyed. Distilled water is made as follows : Take of water 

 10 gallons; distill 2 pints of impurities and throw them 

 away; then distill 8 gallons, Put in glass bottles. Dis- 

 tillation is the operation by which, with the aid of heat and 

 closed vessels, the volatile or liquid parts of bodies are sep- 

 arated from the fixed or solid. Distillation is purification. 



FISTULA OF THE ANUS, 



When on account of the friction caused by the action 

 of the muscles of the tail, is greatly benefited by confin- 

 ing the tail to a rope fastened around the neck, the same 

 as horse dealers do when they link their horses together 

 for traveling. (Percivall.) 



