. The pruning-book; a monograph of the pruning and training of plants as applied to American conditions. 79. A healed-iu stump. danger is on the lower edge, where the up-rollingcallus-ring forms a cup which holds water. It would be untrue to conclude that decay fol-lows from all serious and exposed wounds. shows a section of a maple log, in which the THE ROTTEN HEART 89 buried stump is hard and sound; but such in-stances are the exception, particularly in humidclimates. We are now able to understand that while. The stump is diseased, dressings or applications to the wound cannotdirectly


. The pruning-book; a monograph of the pruning and training of plants as applied to American conditions. 79. A healed-iu stump. danger is on the lower edge, where the up-rollingcallus-ring forms a cup which holds water. It would be untrue to conclude that decay fol-lows from all serious and exposed wounds. shows a section of a maple log, in which the THE ROTTEN HEART 89 buried stump is hard and sound; but such in-stances are the exception, particularly in humidclimates. We are now able to understand that while. The stump is diseased, dressings or applications to the wound cannotdirectly hasten the healing process (page 84),they may aid it by preventing the decay of theparts, and they may be the means, thereby, of 90 THE HEALING OF WOUNDS saviug the tree. That is, dressings are preven-tive, not curative ; and in this thej^ are akin tothe antiseptic dressings of the surgeon, which


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