CHESTNUT BARK DISEASE. 399 
East Rock Park, New Haven. This rock rises to a considerable 
height above the surrounding country, and the soil in many 
places is quite shallow, so that the trees have suffered severely 
from lack of moisture during the dry years. The chestnut has 
suffered with the other trees, and the blight has developed con- 
spicuously, killing many of them. Superintendent Amrhyn 
furnishes us with the following list of dead and dying trees 
that were found in this park in 1910. 
“I herewith enclose a list of dead trees found in the East 
Rock Park forests in an inspection made during the month of 
August, 1910. You will find the largest percentage of them 
to be chestnut and hemlock. The first were not all dead, but 
were severely affected by the blight. The hemlocks are all 
dead, but a few of them have been in that state for two or 
three years, while all affected or dead chestnuts were cut down 
last winter. 
Chestnut ...... 1,362 Hickory ....... 75 Beech ......... 15 
Hemlock ...... 494 Maples ........ 48 Elm sesicdics oes 10 
Oaks :e secs eas 271 Walnut ........ 44 Linden ........ 7 
Bithtsscsccidieces IoI Wild cherry 24 Locust ........ 4 
Cedar ......... IOI ASH eiawaw sees 23 Sassafras ...... 3 
Carpinus ...... 84 Pines .......... 17 Apple ......... 2 
“T think that a’very large percentage of these trees, 2,685, 
have died on account of the great dryness which has existed 
for about three years, changing conditions ever so much for 
the root systems of the trees.” 
Other investigators have admitted the connection between 
drought injury and blight infection, or at least the possibility 
of such connection, as shown by the following quotations: 
Stone (Rept. 23, p. 57) says: “Our observations on the effects 
of meteorological conditions on vegetation, and the unusual 
opportunities we have had to study shade tree conditions for 
some years, have brought to our attention the unusually large 
amount of dead wood found on chestnut trees the past four 
or five years. From what we have seen of the chestnut during 
this period, we are of the opinion that it has not been in the 
best condition during late years, and that the chestnut, like the 
native white and black oaks, elms, red and rock maples, ash, 
etc., has been more or less affected by the severe cold and 
droughts of late years.” A year later he writes further (Rept. 
