will be to obtain a hybrid of _regia_ x _nigra_ that will
combine the resistance of nigra to the "pourridie" and regia's habit of
vegetating late in spring.

By virtue of the ability of the female element to transmit its rusticity
and vegetative form it seems, _a priori_, that we shall get a good
rootstock by crossing _nigra_ as mother by Franquette (sic) and then if
need be, by backcrossing to Franquette in the second generation.

There exists a 4th type of walnut graft, dating from 1880, which if done
intelligently, permits the rapid multiplication of the walnut--the root
graft.

In a short but very interesting report to the Nut Congress of Grenoble
in October, 1936 by Mr. Leon Treyves, and very kindly sent on to us, the
author says, "This procedure, devised by my family around 1880, consists
of grafting on one year old roots, branches from selected, vigorous
trees, either by cleft or English grafts, whichever gives best fit of
scion (which is generally smaller than root) and stock. Graft is then
tied with raffia and waxed to avoid all contact with air and placed in a
moderately heated frame. After a month of this treatment the graft has
taken. Then it is gradually accustomed to open air and the frame is
removed. In the fall or the following spring the graft may be planted in
its permanent location or in nursery row.

This system presents numerous advantages:

1. Rapidity, since the plants can be grafted after one year,
instead of three or four.

2. Economy of time and expense, since considerable numbers of grafts
can be made rapidly and in limited space.

3. More rapid development of growth and fruiting. Saplings of 1 to 2
meters planted in winter of '28-'29 measured in October '36 25-27
cm. in circumference at one meter from ground. Trees two and three
years old, still in nursery, are bearing one to two normally
developed fruits.

The author indicates that he uses _nigra_ for stocks, "since that is the
only one that has proved its adaptation to grafting and its resistance
to the "pus disease"."

At the time he gave his paper in '36 Mr. Treyves announced that he was
continuing his grafting experiments on _J. Sieboldiana, cordiformis_ and
_torreyi. [J. torreyi_ = _J. major_--J. C. McDaniel.]

Mr. Treyves, whom we cannot thank too much for his favor, was kind
enough to set forth the preliminary techniques of his method of
root-grafting. We give a resume of them here.