64 
ROOK FLOOR OF GREATER NEW YORK. 
[bull. 270 
Summary of records of borings made in New York and vicinity — Continued. 
2. BORINGS IN THE BOROUGH OF MANHATTAN— Continued. 
Location. 
Depth of boring to rock. 
Kind of rock, if known. 
Serial 
num- 
ber. 
As given. 
Referred 
to U. S. 
(latum, 
Sandy 
Hook. 
Riverside Park extt nsion— Continued. 
Twelfth avenue — Continued. 
•t north of 834 
22.66 
- 32. 10 
-12 
-15 
22 
-13.50 
-20. 50 
— 7 
- 9.50 
L9.66 
22. 33 
12 
-25.50 
26 
21.:;:; 
LSI. 50 
11 
22. 10 
-22 
20 ;:; 
8.50 
L6.66 
17.50 
-17 
16.00 
-18 
-17 
-19.66 
-13.25 
-13. 50 
-10.16 
- 8.50 
5. 50 
6 
-15 
-24 
- 4 
- 7 
-14 
- 6 
-13 
1 
- 2 
-12 
-14 
- 4 
-18 
-18 
-13 
-12 
- 6 
-14 
14 
-12 
1 
- 9 
10 
- 9 
- 9 
-10 
- 9 
-12 
- 5 
- 6 
- 2 
1 
2 
o 
Rock or bowlder. 1 
Do. 
Do. 
Do. 
Do. 
Do. 
Do - b 
Do - t 
Do- 
D "- 
Do- 
Do. 
Do- 
Do - 
Do- 
Do- 
Do. 
Do. | 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do- 
Do. 
Do. 
Do- 
Do. I 
Do. 
Do. 
Do. 
Do. 
836 
25 feet north of 835 
837 
838 
Southeast corner 155th street . . 
3 feet west of 837 
839 
50 feet north of 837 
S40 
841 
7d fret east of northeast corner 
of L55th street. 
6 feet west of 840 
842 
100 feet east of S40 
843 
5 feet west of 842 
S44 
50 feel north of 842 
845 
50 feet north of S41 
846 
100 feet north of 840 
S47 
6 feet west of 846 
848 
25 feet north of 846 
849 
25 feet north of 848 
850 
25 feet north of 849 
851 
852 
Southeast corner 156th street .. 
7 feet south of 851 
853 
45 feet south of 851 
854 
855 
25 feet north of 853 
25 feet nort h of 854 
856 
5 feet north of 855 
857 
20 feet north of 856 
858 
25 feet north of 857 
859 
25 feet north of 858 
860 
200 feet north of 851 
' 861 
25 feet north of 860 
862 
25 feet north of 861 
863 
25 feet north of 862 . 
864 
5 feet north of 863 . 
865 
20 feet north of 864 
866 
25 feet north of 865 . . 
867 
25 feet north of 866 . . 
868 
25 feet north of S67 .. 
