82 VRTRRINAR 1 ' 1)E\ T. \ L S URGERT. 



abundant, the more liquid portion passing out 

 through the openings connecting the sinuses with 

 the nasal chambers, while the thicker portion remains 

 in the cavity. It gradually undergoes a transforma- 

 tion becoming thick and greasy looking, with a very 

 offensive odor. 



Should the above condition be present in a young 

 animal, before the facial bones have become firmly 

 united or grown together, the pressure exerted by 

 the enclosed pus may be sufficient to force them 

 apart, destroy the skin, escape through the fissures 

 and pass down over the face. This condition does 

 not often occur, yet I have noticed it on several 

 occasions. 



November 2d, 1888, Mr. N. Boyles,of Richland, 

 Mich., brought to the infirmary a bay gelding 

 twelve years old, suffering from a distension with 

 pus, of the frontal and maxillary sinuses. There 

 was a copious discharge of fetid pus from both 

 nostrils as well as from an external opening which 

 had formed just below the eye. The molar and 

 lachrymal bones had had their articular surfaces 

 separated allowing free exit for the pus. 



The sides of the face presented a very disgusting 

 appearance not unlike that usually noticed in severe 

 cases of poll-evil and fistulous withers. 



The diseased bone was removed, exposing the 

 frontal sinus; the fingers and bone cutting forceps 



