160 ^iDISEASES OP THE BONES AKTJ ABTICITLATIOITgl 



from the suddenness and violence of the pain, or to induce 

 inflammation in the splint, and very severe lameness. 



Splinta ia the hind legs seldom cause lameaess ; they &t€ 

 usually upon the outer side of the metatarsal bone. There are 

 many examples of ostitis that will be described more appro- 

 priately under the head of lameness. Sore shins and splints 

 are perhaps the only ones, usually met with in practice, of in- 

 flammation of the compact shaft of the bone ; the other forms being 

 found attacking the cancellated structure composing the short 

 and irregular bones, and the extremities of the long ones. But 

 before passing on to these, I shall describe scrofulous inflamma* 

 tion of bones, caries, necrosis, and the non-inflammatoiy diseases. 



SCROFULOUS OSTITIS IN YOUNG ANIMALS. 



Tubercular or scrofulous arthritis and ostitis is not an uncom- 

 mon disease, and is known as joint-ill. It attacks animals of all 

 ages, but particularly the young. In cattle it sometimes assumes 

 the form of malignant " foul in the foot" (paronychia ungularis 

 maligna), and the following is the pathological anatomy of a 

 case of "foul in the foot " arising from scrofula, occurring in 

 my own practice. 



The animal was a two-year-old heifer, which had been suffer- 

 ing for about five months froni foul of the foot ; having detied 

 all the ordinary remedies to effect a cure, and the fact that 

 several animals" on the same farm, and of the same breed, were 

 similarly effected, induced the veterinary surgeon in attendance 

 to send one of the affected feet of this malignant case to the 

 College for examination. 



Tke part sent was a fore foot, having been cut through about 

 the lower third of the metacarpus, showing the fetlock joint and 

 the two complete digits attached. — (See Photo-lithograph, Plate 

 II., Figure 9.) 



In external appearance it was very much swollen, and studded 

 round with ulcers of various shapes and sizes, from that of a six- 

 pence to that of a halfpenny. The fetlock joint was completely 

 open on the right side, and deep ulcerations of the articular svir- 

 faces of the bones had taken place, more particularly of the 

 trochlea of the metacarpus. 



On attempting to remove the skin, it was found closely ad- 



