122 THE HEALING OF WOUNDS 



such a wound properly trimmed and cleaned. It 

 was a case of disease starting at a knot. The 

 knot has been wholly cut away, and all diseased 

 tissue is removed. If decay is now checked, the 

 healing callus will soon cover the 

 area. This will at once suggest what 

 is to be done with the dead patches 

 of bark left by body attacks of 

 pear -blight, borers, injury from sun- 

 scald, gnawing by horses, loose bark, 

 and the like. 



It is but a step from these cases to 

 those of the splitting of the trunk 

 by cold, concerning the treatment 

 of which so many questions are 

 asked. Fig. 102 is a sweet cherry 

 tree which was split to the heart by 

 a cold winter and then neglected. 

 The bark has rolled back through 

 the action of alternate wetness and 

 dryness, the wood has become life- 

 less and the crack has gaped. Fig. 

 101. Treatment 103 * s a peach tree which was 

 of a body similarly injured; but in this case 

 wound. the k ark wag tr i mme( j back to the 



quick as soon as spring opened and the injury 

 discovered, and the area was painted with Bor- 

 deaux mixture. At the end of the same year, the 

 wound was nearly healed, and the tree is prob- 

 ably the better for the accident, since the pressure 



