CHE REFERENCE LIBRARY - Pole Shift Survival Information

150 THE NURSERY-MANliAL
the new tissue. In the meantime, the wound should be prot,ccted
b>. a dressing, a, wax or pa,&, to prevent decay. In
cleft-grafts, the swfxces should be covered with wax every
year until they arc closed over by the new tissue. In most
cases the wax will loosen &e first season, a,nd sometimes it
The character of the hea,ling
process is well depicted in Figs.
181, 4w, 183. In Fig. 181 is
yearling cleft-graft of
apple. The strip of wax along the
side of the cleft is seen to have split
with the enlargement of t.he branch,
and the cleft has filled
up with tissue and is
now sa.fe from infection
of disease or rot. The
roll of liea,ling tissue on
1 the end of the stub is
year after setting (s 1). seen about the border
of the wound. This
tissue has not >*ttt (*o\wererl the cleft across the end of the stub,
and this cleft, if exposed to the weather, is a fertile pla.ce for the
starting of cleca~-, for the cleft does not unite except along the
sides of the stub bt~ncath the hark. When this stub is split
lengthwise, following down the cleft, we may readily distinguish
the lor*ation of the healing tissues, Fig. 182. The lower
ends (if the vions ;m at T1:, and t.hey are now inactive and nearly
lifeless bits of wood. The new or healing tissue has been built
up on the outward side of the c,ions. On the left, this deposition
of new tissue may be traced as far down as H, while it is thick
ant1 heri\-J* at K ant1 above. The whole interior part of the stub,
repre~entcri by the dark shading, is dead tissue, which will
soon begin to deca,y unless it is well protected from the weather.