SALIVARY CALCULI. 241 



side. The swelling was painful on pressure, and my first 

 idea of its nature was, that it had proceeded from a blow* 

 Cold applications were made use of; ultimately, it was blis- 

 tered. This caused it to suppurate and discharge a glairy 

 ill-conditioned sort of matter. At the expiration of three 

 weeks, the near side of the face commenced swelling in the 

 same manner, which convinced me I was wrong in ima- 

 gining the other tumor was caused by injury. The same 

 treatment was pursued ; but this did not suppurate. I then 

 used the iodine ointment, which appeared to diminish it. 

 The tumour upon the off side became fistulous, continually 

 issuing the glairy matter, as at first, and giving evident 

 signs that the bone within was in an unsound — most likely 

 carious — condition. 



SALIVARY CALCULI. 



British veterinary practice appears to have been eminently 

 unproductive of cases of this description. Were it not for 

 the recorded observations of continental veterinarians, we 

 should have felt at a loss in what way to have supplied this 

 defect in our nosology. 



From D^Arboval — our principal source of information — 

 we learn that calculi have been discovered within most of 

 the salivary glands, but are more commonly found within 

 their ducts, and particularly within the parotid duct. They 

 have a whitish aspect, take the form of the canal, and are 

 extremely hard and weighty, tasteless and odourless, and 

 have an oat or small pebble, which has got into the duct 

 through the mouth, for a nucleus. When lodged in that 

 part of the duct which is but skin-deep, the calculus is 

 perfectly obvious ; but when sticking just within the orifice 

 of the canal, unless of considerable volume, it is difficult 

 of detection. In this situation, when projecting, the calculus 

 will sometimes occasion excoriation of the buccal membrane, 

 and so far will render mastication sore and painful, besides 

 more or less obstructing the emux of saliva; and it may 

 create some sort of noise during the motions of the 

 II. 16 



