at neighborhood, south-western Pennsylvania and eastern Ohio.

The Chairman: Is the Connellsville fungus also _diaporthe parasitica_?

Mr. Pierce: Yes, sir. It was placed by Mr. Anderson, who did the work
on that, in the same genus as diaporthe, but he preferred the name
_endothia parasitica_.

The Chairman: The question is of changing the generic name, from
_diaporthe_, on the basis of the previously established species?

Mr. Pierce: Yes, sir, previously established species of _endothia_. It
is only a suggestion of Mr. Anderson; it was made by him. This was very
similar to the true blight fungus and when our men first went out into
the western part of the State, they reported these various cases that
came up there as chestnut blight, and none of the pathologists of our
force then were competent to determine the difference, except that the
fact was noted even then that it was not growing as a parasite in the
sense that the true blight fungus has been growing in the east.

The Chairman: That may be due to varietal differences, though, rather
than specific?

Mr. Pierce: Yes, although Mr. Anderson seemed to think it was specific.

The Chairman: Is there any further discussion? The subject is worthy of
a good deal of comment.

Mr. Pomeroy: I want to ask the speaker what the approximate cost would
be for one spraying of a tree about that size, 70 feet in height?

Mr. Pierce: We have photographs on the table there showing our eight
hundred dollar spraying machine, the same kind used in Massachusetts in
gypsy moth work. With this two men can spray about ten such trees in a
day. I haven't got it down in black and white but I figured that, on
those chestnuts at DuPont's, they sprayed about 600 gallons a day. Ten
trees a day would make it, say, with a $2.50 man, not very high for a
tree. I think it costs in all something like four dollars a tree during
the whole season, but that is a very rough estimate and the materials
are not included.

The Chairman: The cost will have to be calculated on a sentimental basis
for the ornamental trees, and on a commercial basis for the commercial
trees. The actual value of the spraying has not yet been determined.
This spraying cannot reach the mycelium in the cambium layer; if the
disease has been carried in by a beetle or woodpecker your spraying
would be ineffective.

Mr. Pierce: Yes indeed, that was just the thought Mr. Galena had,
notwithstanding the fact that they cut out all v