9 March, 1908.] 



Diseases of Farm Animals. 



151 



serious form is when the fracture involves the socket of hip joint (the 

 cotyloid cavity or acetabulum). In this case there is great lameness and 

 it is practically permanent, for, in the process of union bone is deposited 

 around and within the joint, which is thereby rendered permanently stiff. 

 When fracture of the pelvis is suspected but .not confirmed by external 

 manipulation an internal examination should be made by introducing the 

 arm into the rectum, when most likely crackling movement (crepitation) 

 of the fractured bones, or at all events swelling and heat at the seat of 

 fracture may be felt. 



Fig. 12. Split pastern — 

 transverse and longi- 

 tudinal fracture. 



Fig. 13. Double fracture of Fig. 14. Latero-longitudinal 

 head of long pastern fracture of long pastern 

 bone. bone. 



15. Split pastern, 

 side fracture. 



16. Split pastern, 

 fracture repaired. 



Dropped Hip. — This is a condition in which the point of the hip (the 

 anterior spine of the ilium) is broken off. It usually results from a blow 

 such as may be sustained by contact with a door post when the animal is 

 rushing into the stable. It is seldom accompanied by serious lameness 

 but the muscles of the quarter may become wasted for a time, usually 

 the fracture unites without trouble or treatment of any kind. Sometimes 

 however a false joint is formed and the broken prominence is always move- 

 able. In all cases the displacement remains, i.e., the point of the hip is 



