46 MISCELLANEOUS PAPERS. 
scopically. Reports have been received indicating that the disease 
is found at many other places, but not being substantiated by 
specimens these localities have not been shown on the accompanying 
map. It is only fair to state, however, that such reports have been 
received from points as remote as Cape Cod, Wellesley, and Pitts- 
field, Mass.; Rochester and Shelter Island, N. Y., and Akron, Ohio. 
The bark disease is entirely different from a disease which during 
the past twenty years has caused the death of many chestnut trees 
on the Atlantic slope, particularly south of the Potomac River. The 
latter disease, which is now being studied by the Department of 
Agriculture, is asso- 
ea A Dares 
dat 
ciated with insects, is 
much slower in action 
than the bark disease, 
and produces a_ stag- 
headed condition of the 
tree. It can be quite 
confidently stated that 
the bark disease does 
not yet occur south of 
Virginia and at only a 
few points in that 
State. 
Investigations are in 
progress to determine 
the origin of the bark 
disease in America and 
the details regarding 
its spread. The theory 
Fic. 2.—Map of the eastern portion of the United States, ag dvanced in a previous 
showing the distribution of the chestnut bark dis- ents Fae a5 0) 
ease. The heavily shaded part shows the counties pudiication of tits u- 
wherein infection is already complete. The round rea.” that the Japan- 
dots show other points where the disease is positively is : : 
HGR a Bae sc ese chestnuts were the 
original source of 
infection, has been strengthened by many facts. It yet lacks much 
of demonstration, however, and is still advanced only tentatively. 
While the disease has spread principally from the vicinity of 
New York there is much to indicate that it occurred at other points 
at an early date. Chester’s Cytospora on a Japanese chestnut, 
noted at Newark, Del., in 1902, may have been the bark disease. 
Observations-by the junior writer indicate that this disease may 
have been present in an orchard in Bedford County, Va., as early 
VK 
“Bureau of Plant Industry, U. S. Department of Agriculture, Bulletin 121, 
Part Vis 71908: 
141—-y 
