476 



Journal of Agriculture. 



[8 August, 1907. 



when this swelling is pressed upon it may be reduced, and a smaller dis- 

 tension appears on the outer aspect of the hock towards the back (Fig. 



Fig. 80. CltMii lid.k. (Alter Hayes.) Fig. 8i. lk)g spavin (slightly). (After 



Hayes.) 



84). The increased quantity of oil which causes the swelling is the 

 result of friction beween the articular cartilages covering the ends of the 



Figs. 82 and 83. Bog spavin (pronounced) seen fiom behind (After Dollar.) 



bones entering into the formation of the joint, the excess of joint oil 

 being secreted to prevent or lesson that friction. 



