140 
JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
below the lower trans¬ 
verse wound, shows that 
the disease has penetrated 
to the very heart of the 
wood and is there spread- 
ing itself. It will he well 
to observe that the 
yearly growth of the 
wood between the centre 
and that portion of the 
circumference where the 
bark is swollen and dis¬ 
eased is very different 
from that on the other 
side of the stem. In the 
former the zones are 
much diminished in 
width and irregular, 
while in the latter the 
zones appear regular and 
of an usual character. 
I may mention that I 
have carefully looked for 
any insect action while 
examining the specimens 
from which the draw¬ 
ings were made, and I 
do not perceive that there 
is any trace of insects 
having had anything to 
do in causing the disease 
which I have attempted 
to describe. 
[Note .—All the draw¬ 
ings are from the tree 
on Warberry Hill, ex¬ 
cept Fig. 1, from the 
'VVatcombe tree.] 
Fig. 7. — Half natural size. 
