244 



DISEASES OF BONE. 



by the fact that the increase of size of the part and tlie influence 

 of tlie disease on the animal's gait are generally not sufficient to 

 attract attention.' The term, sometimes used, of " spavin on the 

 outside of the leg.'' is entirely a misnomer ; for here, the bony 

 affection does not extend above the head of the splint bone ; while 

 in spavin, one or more of the bones above the splint bone are 

 always implicated. This limitation to the extent of the inflamma- 

 tion of the head of the outer splint bone of the hind leg, has been 

 proved by careful researches made by Gillet, Goubaux, and Barrier. 



Fig. S4. — Jarde. 



Fig. 85.— Jarde. 



A jarde (to use the French expression) is usually due to excessive 

 strain of the ligamentous fibres (p. 229) which are inserted on that 

 bone. The resulting intiammation causes enlargement of the bone 

 near the seat of injury, and may extend downwards, thus increasing 

 the size, to a greater or less extent, of the remainder of the splint 

 bone ; but not upwards, as already said. The inflammatory action 

 may be confined to the splint bone, or may extend inwards to 

 the head of the cannon bone, thus forming a splint, which by 

 occupying a portion of the groove (formed by the cannon bone and 

 two small splint bones) in which the suspensory ligament lies, will 

 push out, to the rear, the suspensory ligament and the back 



