FEACTUEE OF THE THIGH. 299 



distinguish between this accident and severe sprain of the " under- 

 cut " muscles (p. 61). Hsemoglobinuria (p. 504) is. sometimes 

 mistaken for broken back by inexperienced persons ; although the 

 dark-brown colour of the urine, in the former, as well as the 

 history of the case, should readily serve to distinguish it from the 

 latter. 



Broken back generally occurs from falls, or from the practice of 

 tying horses tightly up after casting them. 



Buttock, point of the. — See " Tuberosity of the ischium," 

 page 306. 



Trochanter major 



Head of thigh bone " 



Fig. Il6. — ^Thigh bone (femur). (After Chauveau.) 



Cannon Bone. 



If there is displacement, the ends of the bone should, if possible, 

 be brought into position without delay, and splints and bandages 

 applied ("General Treatment of Fractures," p. 295). 



Femur {Thigh Bone). 



The only not very uncommon fracture of the thigh bone I need 

 consider here, is that of the trochanter major (Figs. 115 and 116), 

 which is the bony mass that projects above the head of the thigh 

 bone (femur) and covers the hip joint. The chief muscle which 

 extends the thigh, and thus aids in propelling the animal's body 

 forward, is attached to the trochanter major. The only treatment 

 is prolonged and perfect rest. The horse often recovers after this 

 accident sufficiently well for light work. If repair does not appear 

 to be readily taking place, the part may be blistered once or twice. 



Hip, point of the. — See page 306. 



Ischium, Tuberosity of the. — See page 306. 



