120 INSALIVATION. 



case, in which a tumour of this description, the size of a 

 pullet's egg, existed on either side of the tongue, giving rise 

 to considerable inconvenience. 



These cases call for the removal of any obstruction, and 

 puncturing the distended duct. 



SALIVAEY CALCULI, or concretions, form chiefly in the 

 parotid duct of herbivorous quadrupeds. They are composed 

 of carbonate of lime, containing about 84 per cent, of this 

 salt, besides phosphate of lime, animal matter, and water. 

 In the submaxillary and sublingual ducts of the horse, small 

 roundish or mulberry form, smooth and yellowish white con- 

 cretions are sometimes found. 



The common cause of such concretions is an accidental 

 nucleus, either penetrating the canal from the mouth, or 

 formed from the salts of the saliva. 



Treatment consists in removing the calculi by the knife, 

 and afterwards treating as recommended under the following 

 head. 



SALIVARY FISTULAS. Wounds communicating with a 

 salivary gland or duct, are of somewhat frequent occur- 

 rence, especially from the incautious aperture of abscesses in 

 awkward situations. They always implicate the parotids. 

 The chief symptom is the discharge of saliva, especially dur- 

 ing mastication. I have treated many cases of this description, 

 and never experienced difficulty, by adopting a plan of treat- 

 ment most favourable to granulation and gradual contraction 

 of the sinus. I am opposed to rash measures such as the hot 

 iron and caustics. Where the salivary duct has been acciden- 

 tally cut, I should recommend shaving the hair, and applying 

 collodion or adhesive plaister. The animal must be kept for 

 many hours without food and water, and then allowed only gruel. 

 Where the parotid gland has been injured in opening a deep- 

 seated abscess, I have found poultices, followed by cold- 



