with his ability to dig into the bark and
extract a piece of cambium, was not sent to us to aid in preserving our
trees by stimulating new growth?

In my work last summer trees that were subjected to slight injury before
hand apparently accepted a larger proportion of grafts. I will briefly
cite two specific illustrations. A little butternut tree located near
the house was the object of my efforts for over two years. During my
illness I frequently went out and pruned a few branches or put on a few
buds. Something would happen to me and possibly I would not see it
again for months, and in the meantime the buds would be strangled or
knocked off. Another little hickory tree stood in the roadway. Harrows,
plows, wagons and even logs were dragged over it. Grafts on both these
trees caught rather readily last spring. In fact two black walnut grafts
on this little butternut were two of the very few that I got to grow at
all last year. My walnut grafting was almost a total failure. I have
this to say, however, that I had no dormant walnut scions, my scions all
being cut in May or June.

Mr. Jones, by marking the site of his patch bud several days in advance,
admirably carries out this idea by locally stimulating the cambium
cells. Dr. Morris's scheme of using white wax, besides regulating sap
pressure, allows the actinic rays of the sun to stimulate cellular
activity. Cutting the top out of the tree, which disrupts the normal
circulation and throws it into the few lower limbs, besides stimulating
the cells into activity, has apparently in a large measure accounted for
the slight success that I have had. Other methods such as injecting some
substance under the bark, applying antiseptics, or some stimulating
chemical in a similar way, as "Scarlet Red" is used in skin grafting to
increase epithelial growth, may aid materially. Certain chemicals
applied to the tree and leaves, as used in sprays, seems sometimes to
stimulate growth in a way that can hardly always be accounted for by the
checking of the disease for which it was placed.

Much more could be written on cellular stimulation but enough has been
said to encourage others to make observation in this connection, for it
is highly probable that the lack of proper stimulation of the cambium
accounts for more failures in top working trees than we are aware of.

3RD CONTROL OF PLANT CELL NUTRITION

With this topic we are probably less concerned in its relation to
graft