358 



DISEASES OF THE FEET. 



Fig, 68. 



Fig. 67 represents a section of the foot with its various parts in a healthy 

 condition, and in their proper relative positions. 



Fig 68.— Formation of a horny exudate at the toe, causing alteration in the 

 several positions of the os pedis, wall and sole, and the formati.in of convex or 



pumiced sole Whilst this process is going on, the extensor pedis is elongated, 

 and the flexors thrown into a passive condition. 



FrG. 68 a —Perforation of the horny sole by the toe of the pedal bone, due to the 

 pressure of the new formation.— (CW/e^e Museum.) 



