e summer grafts, on the other hand,
had contained only a partial supply of pabulum, enough to allow them to
make six leaves and a top bud. After a few days of resting these shoots
with meager larder could then go forward with new food furnished by the
whole tree.

Mediate and immediate winter grafts were alike in their method of growth
in the spring. This would seem to confirm the idea that character of new
growth is dependent upon the relative quality of stored pabulum in the
cambium layer.

In experimental work it was noted that both mediate and immediate winter
grafts make a slower start in the spring than do the grafts inserted in
springtime. This is perhaps due to the formation of a protective corky
cell layer over wound surfaces. New granulation tissue would then find
some degree of mechanical obstacle in the presence of a corky cell layer
at first.

Herbaceous plants allow of grafting. We are familiar with the example of
the tomato plant grafted upon the potato plant, furnishing a crop of
tomatoes above and potatoes below.

It seemed to the author that the herbaceous growth of trees should be
grafted quite as readily. This seems to be not the case. A number of
experiments conducted with grafting of the herbaceous growth of trees in
advance of lignification has resulted wholly in failure with both soft
wood and hard wood trees.

The walnuts carried herbaceous bud grafts and scion grafts for a long
time however. These grafts sometimes remained quite green and promising
for a period of a month but lignification progressed in the stock
without extending to the scion. Speculation would introduce the idea
that lignification relates to a hormone influence proceeding from the
leaves of a tree and that the leafless scion does not send forth
hormones for stimulating the cells of the scion to the point of
furnishing enzymes for wood building.

Perhaps the most interesting part of new tree work relates to
experiments which are failures. Negative testimony is like the minor key
in music. There are many men who care to do only things that "cannot be
done." These are the ones who have made our progress in almost every
field of human activity.

STOCKS FOR HICKORIES

_Willard G. Bixby, Long Island_

MR. BIXBY: The sheets which I am distributing to you contain tables to
which I shall refer during this talk. But first I will give a little
foreword regarding the trees. The trees enumerated in the tables shown
we