138 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
the wound, which penetrates the wood in two places, each of a 
triangular form, the apex pointing directly to the centre of the 
Fig. 4.—Natural size. 
Fig. 5.—Horizontal section of Fig. 4. 
branch, towards which point they have penetrated at least half¬ 
way. 
Fig. 7 pourtrays a portion of a branch of fourteen or fifteen 
years’ growth, on which the disease is of an extensive and 
advanced character, covering many superficial inches of the sur- 
