186 THE DENTISTRY OF* THE TEETH. 



mouldered away. Two others presented brittle exos- 

 toses upon their sides, forming spacious cavities within 

 and communicating with the contiguous teeth. One 

 of them exhibited a perforation through which pus 

 appeared to have issued. Both seemed to have been 

 cases which had originated in internal injury." 



Prof. George Varnell closes his series of papers " On 

 Some of the Diseases Affecting the Facial Kegion of 

 the Horse's Head" ("Veterinarian," 1867), by giving 

 an account of a case of ' osteo-sarcoma,' the disease, in 

 his opinion, being caused by carious teeth. The case 

 illustrates the importance of veterinary dentistry ad- 

 mirably. He says : 



"Further to illustrate varieties of the diseases of 

 the sinuses, I will relate a case of osteo-sarcoma which 

 came under my care in July, 1862. I found the horse 

 had an offensive discharge from the left nostril. The 

 face below the orbit was enlarged, and the eye slightly 

 displaced in its cavity. I also found that the three 

 last grinder teeth in the upper jaw of the affected side 

 were quite loose in their sockets, from which a dis- 

 charge of a highly fetid character issued. Percussion 

 on the side of the face indicated extensive disease, and 

 the enlargement readily yielded to pressure. As there 

 was not the slightest prospect of a cure, I suggested 

 that the animal be killed. 



"Post-mortem Examination. The outer walls of the 

 sinuses, which were very thin, were first removed, dis- 

 closing a mass of disease the seat of which was oppo- 

 site the roots of the fourth grinder tooth, which was 

 carious. This abnormal growth occupied the maxil- 

 lary, malar, lachrymal, and a portion of the frontal 

 sinuses, and had also encroached upon the orbit to 



