190 
I wish again to acknowledge the interest of Hon. Raymond V. 
Ingersoll, commissioner of parks, Borough of Brooklyn, in this 
work, who generously placed men and equipment at my disposal 
and thus made possible the collection of specimens for study. I» 
am also greatly indebted to Doctor J. J. Davis, curator of the 
herbarium at the University of Wisconsin, for valuable assistance 
in the identification of many of the fungi collected during the 
progress of the survey. 
During the first part of the present season a detailed study of 
the condition of the trees in the southern section of the Park was 
made. The area covered included the section of the Park be- 
tween the lake and the fence, extending from Gate 3, Lincoln 
Road Entrance, around to Gate 6, Coney Island Avenue En- 
trance, together with a narrow strip north of the lake extending 
from Gate 6 to Gate 3. In addition, the condition of the trees on 
the streets bounding the Park was included, the streets being 
Ocean Avenue from Lincoln Road to Parkside Avenue, all of 
Parkside Avenue adjacent to the Park, and Coney Island Avenue 
from Parkside Avenue to Gate 6. 
A careful examination of each tree more than six inches in 
diameter in the section of the Park above referred to was made 
with reference to the occurrence of decayed areas on the main 
trunk and the larger limbs. A study of the extent of such areas, 
the depth to which the decay had extended and the relation of 
these areas to previous pruning operations, was carried out. The 
smaller and younger trees were not included in this survey for, 
in general, they were in good growing condition and free from 
the presence of decay-producing organisms. These trees were 
not included in the totals. 
The area intensively surveyed contained approximately 1,830 
trees, representing about fifty different kinds. In several cases 
only a very few trees of a kind were found in the area. In other 
cases, for example, the elms, lindens, maples, sycamores and 
others, the number of trees was quite large. 
Decayed places were found on many of the trees included with- 
in this section of the Park. These decays were classified as 
major or minor, depending upon whether the places were ex- 
tensive, more or less deep seated and found on the main trunk, 

