varieties that have stood a temperature of twenty-three degrees
below zero.

I have discovered another variety in Lancaster. This tree was brought in
from Germany about thirty-five years ago and it has turned out to be an
extremely valuable variety. I have seen these nuts selling in the open
market at fifty cents a pound. As regards propagation of the Persian
walnut, of course the black walnut is the most common variety on which
to propagate. Another stock is the Japan walnut, in a sense better than
the black for grafting. It has a better lateral root system and is not
so fierce in going down to the center of the earth. Its root system is
magnificent. Several trees budded on this stock a year ago last August
and transplanted in November the same year, had a growth this summer of
over six feet from the bud, showing that there must certainly be
remarkable vitality in the Japanese roots. I have a young tree thirteen
years old budded on black walnut that produced twenty-one nuts this
summer. I have a seedling about ten years old which didn't have one
catkin bloom. But a tree of the Rush variety, so named for me by Mr.
Jones, the first propagator, stood about forty feet away from the first,
and at the end of the season this seedling tree produced sixty finely
developed nuts. This seedling tree, however, had a great many pistillate
blossoms, which received pollen from the neighboring variety that was
prolific in staminate bloom. It would seem to be an advantage for a
seedling Persian walnut to have a good pollenizer in its company.

PROFESSOR SMITH: I was struck by Mr. Pomeroy's statement that after
apparent killing of the staminate bloom by frost the pistillate blossoms
appeared and he had a crop. Evidently he got fertilization from some
outside source. The Persian walnut in the eastern part of the United
States is like many other trees in that its trouble does not arise from
susceptibility to winter cold, for when it is dormant it appears to
stand great cold. The trouble with the Persian walnut is its tendency to
start growing at the first approach of warm weather and if the cold
comes later it may kill the tree. Mr. Pomeroy's farm there near the
shores of the lake has an immunity from sudden changes of temperature
and therefore his trees are not likely to make growth which will be
caught by late fall or early spring frosts. Unquestionably he can grow
Persian walnuts better there than can be done five hundred to a thousand