88 THE HEALING OF WOUNDS 



hood that disease will gain an entrance. On 

 perfectly smooth and solid wounds, the greatest 



79. A healed-in stump. 



danger is on the lower edge, where the up -rolling 

 callus -ring forms a cup which holds water. 



It would be untrue to conclude that decay fol- 

 lows from all serious and exposed wounds. Fig. 

 81 shows a section of a maple log, in which the 



