rmula 5-5-50, five pounds of copper sulphate and five
pounds of lime in 50 gallons of water was found to be injurious to the
foliage in the Spring. This was changed therefore, to 4-5-50, which had
one pound less of copper sulphate. This did not seem to injure the
foliage.

About 70 trees were sprayed twenty times during the season. Nearly all
of these were gone over four times to remove diseased branches and
cankers, once in October 1911, then in early summer and again in
September and November 1912. As an example take tree No. 6 which was
studied, December 14, 1912. It is 39 inches in diameter at breast
height, and approximately 70 feet in height. On this one tree six
diseased limbs were removed, and sixteen cankers were cut out. Of these
sixteen, two infections continued, that is, were not completely cut out,
and had spread; three had infections below old limbs which had been
removed, and eleven were healing over. This tree was about 1000 feet
away from other badly infected trees, though but 25 feet away from other
chestnut trees in the same row. The experiment of Mr. DuPont in spraying
shows what can be done on valuable lawn trees. On the whole, these trees
look well and healthy. Trees which were not sprayed over three times and
were within 50-100 feet from badly blighted trees, became infected in so
many different places that it will be necessary to remove them.

One of the problems to be solved next year will be that of the least
number of sprayings which will be effective in preventing new infection.

* * * * *

The Chairman: The question of the chestnut blight is now open for
discussion.

Mr. Littlepage: I should like to ask these gentlemen how far west they
have heard of chestnut blight--that is, heard of it with any degree of
authenticity, and also whether or not they care to express an opinion as
to what the prospects are in the middle west, say out in Indiana,
Illinois and Ohio?

Mr. Pierce: In answer to that question, I will say that in Pennsylvania
we have found infections in Wayne County and also in Fayette County,
both near the western extreme of the state, but those have been attended
to, very largely, and the boundaries closely determined. In Ohio there
have been several reports of the blight being found, but I don't think
either of the reports have been proven. There has been a fungus that I
have spoken of as the Connellsville fungus, that has been all around in
th