272 
ANNALS NEW YORK ACADEMY OF SCIENCES 
Pennsylvania, New York and Long Island Railroad Co. 
' The borings made in the preliminary studies for the tunnels of the 
East River Division of the Pennsylvania, New York and Long Island Rail¬ 
road Co. are tabulated approximately in order from west to east, begin¬ 
ning at 7th Avenue and following both 32nd and 33rd Streets to East 
River. Then the Long Island City side is arranged, beginning at East 
River between Borden and Flushing Avenues and following the railway 
to a point 750 feet east of Vanalst Avenue. The figures of depth to 
rock and rock penetration are taken from the diagrams of borings on the 
same drawings and are read to the nearest foot. The correction introduced 
is from mean high water to the U. S. Coast and Geodetic Survey datum, 
which is 2.72 ft. lower. 
East River Division 
a) Manhattan Side. 
Serial No. 
Original 
mark 
Location 
Depth 
to Rock 
M. H. W. 
To Rock 
U. S. 
datum 
Rock 
penetra¬ 
tion 
Form¬ 
ation 
Variety and remarks 
164 
77 
32nd St. & 7th 
Ave. E. side. 
+ 33' 
+ 35.5' 
12' 
Manh. 
165 
SO 
32nd St., 200' 
E. of 7th Ave. 
+ 10' 
+ 12.5' 
32' 
Mica schist 70°. 
166 
84 
32nd St., 410' E. 
of 7th Ave. 
+ 15' 
+ 17.5' 
10' 
Not found. 
167 
90 
32nd St., 615' E. 
of 7th Ave. 
+ 31' 
+ 33.5' 
52' 
Manh. 
Mica schist 80°. 
168 
79 
33rd St., 100' £. 
of 7th Ave. 
+ 22' 
+ 24.5' 
I 4 ' 
Not found. 
169 
93 
Manh. 
Mica schist. 
170 
83 
33rd St., 230' E. 
of 7th Ave. 
+ 10' 
+ 12.5' 
32' 
“ “ , garnet if er- 
OllS. 
171 
91 
33rd St., 410' E. 
of 7th Ave. 
+ 24' 
+ 26.5' 
15' 
Coarse mica schist. 
172 
92 
33rd St., 25' E. 
of B’way. 
+ 34' 
+ 36.5' 
63' 
Mica schist. 
173 
89 
33rd St., 240' E. 
of B’way. 
+ 15' 
+ 17.5' 
9' 
174 
86 
33rd St., 450' E. 
of B’way 
+ 11' 
+ 13.5' 
46' 
U 
Mica schist. 
175 
94 
33rd St,, 200' W. 
of 5th Ave. 
176 
81 
33rd St., 15' W. 
of 5th Ave. 
+ 22' 
+ 24.5' 
62' 
Mica schist and granite. 
177 
93 
1 
32nd St., 15' E. 
of B’way. 
1 
+ 27' 
+ 29.5' 
1 • 
56' 
Not found. 
