26 
ten to fifteen different infections were counted on single specimens 
of young trees near the hemlock forest during the past season. 
When the infections are as numerous as this no means of preven- 
tion is worth the experiment ; and, moreover, some of them are: 
practically certain to be infections of the main trunk, which cannot 
eee 
FIG. Inoculation experiments with young chestnut trees. Specimen on the 
right ae to the base of the trunk by a body infection; specimen on the left reserved 
be treated by pruning. This is especially apt to occur because 
the spores that are washed down from diseased branches find 
lodgment at the base of the branch where the bark is rough and 
very often cracked. 
The disease is abundant in and about New Vork City, on 
Long Island, and in New Jersey, and is known to occur along 
the Hudson as far north as Poughkeepsie. Specimens have been 
sent in from Connecticut, Massachusetts and Maryland. It is 
reported from Washington, D. C., and from Virginia, but I have 
