while underneath were a number of layers of functioning wood. The rest
of the trunk was bare, weathered gray, with traces on its surface of old
cankers, and evidently dead for a long period. This type of tree was so
commonly found that I have called it the strip tree.

INOCULATIONS

The very fact that these trees are now alive in this New York region is
pretty good proof of their resistance. But of course the most conclusive
test is by inoculation with the fungus in question. If the fungus grows
slowly in these trees as compared with its growth on non-resistant
stock, then no one can deny that they are resistant. I will not bore you
with figures of tables, I will only give you the results. The average
growth of the fungus in 289 inoculations on the resistant trees was
about 1/3 as fast as on non-resistant stock, and taking the rate of
growth on those trees which are especially resistant it is about 1/4 as
fast as on the non-resistant stock. For non-resistant stock the
seedlings on Staten Island were inoculated, and the growth on these
tallied very closely with growth in non-resistant trees inoculated by
Anderson and Rankin.[3]

Another very striking result brought out by the inoculation work was
that of the 158 inoculations on branches and basal shoots of the
resistant trees, only nine had been girdled after one month's growth,
while in the same time 16 out of the 32 non-resistant Staten Island
trees were girdled. At the end of the second month, the results were
still more striking. Then, in the Staten Island trees, 22 out of 32 were
girdled, while in the inoculations on the basal shoots and branches of
resistant stock only 22 out of the 153 resulted in girdling. This
striking difference was not due to smaller diameters of the Staten
Island trees, for particular pains were taken to have them approximately
equal to the branches and shoots inoculated in the resistant trees.

SUMMARY OF EVIDENCES OF RESISTANCE

We may summarize the evidences of resistance as follows:

1. The results of the inoculation tests show that the fungus grows in
these trees on the average from 1/4 to 1/3 as fast as in ordinary
chestnut.

2. The occurrence of the trees in a neighborhood long subjected to the
disease, and their presence among the trees of individuals long since
dead.

3. Indications of the long period the disease has been present in the
trees themselves; such as bare weathered tops, and healed cankers.

4. Peculiarities