128 THE GROUSE IN HEALTH AND IN DISEASE 



Figure 7 represents an example of recovery from a fracture 

 of one of the wing-bones in a cock Grouse. The radius in this 

 case had been broken in two at the junction of the middle and 

 lower thirds, probably from a shot wound. The bird must 

 have lived for at least a month or six weeks during the winter 

 without flying, but made a perfectly sound union notwithstand- 



FIG. 7. FIG. 8. 



Broken and re-united wing-bones, 



ing. It survived to be shot dead on the wing in April as a 

 healthy bird killed for purposes of crop analysis. 



Another instance may be quoted of the radius being broken 

 in two pieces at about its centre, probably by shot. In this 

 case the union was incomplete when the bird was killed ; but, 

 though some movement was possible between the broken ends, 

 the formation of callus and new bone had made a considerable 

 advance towards effecting a firm union. 



Figure 8 represents a firmly united fracture of the radius 

 which had been broken in two about the centre. There was no 



