62 
R(KK FLOOR OF GREATER NEW YORK. 
[Bru..'270j 
Summary of records of borings made in New York and vicinity — Continued. 
2. BORINGS IN THE BOROUGH OF MANHATTAN— Continued. 
Serial 
num- 
ber. 
Location. 
707 
768 
769 
770 
771 
772 
77:; 
774 
775 
776 
777 
77^ 
770 
780 
7S| 
782 
783 
784 
785 
786 
787 
788 
789 
790 
791 
792 
793 
794 
795 
796 
797 
798 
790 
800 
Rivt rsicU Park extt nsion — Continued. 
Twelfth avciim — Continued. 
50 feel north of 766 
25 feet north of 767 
140th street 
25 feel north of 769 
L2 feel north of 770 
25 feet north of 771 
i:i feel north of 772 
25 feel north of 77:; 
100 feel north of 769 
25 feel north of 775 
25 feel north of 776 
25 feel north of 777 
25 feel north of 778 
L50th street 
25 feel north of 780 
25 feel north of 78] 
25 fret north of 782 
100 feel north of 780 
25 feet north of 784 
25 feel north of 785 
25 feet north of 786 
15 1st street 
25 feel north of 788 
25 feet north of 789 
3 feet north of 790 
22 feet north of 701 
25 feet north of 702 
125 feet north of 788 
25 feet north of 794 
25 feet north of 705 
25 feet north of 796 
Southeast corner L52d street . 
25 feet north of 70S 
6 feet north of 799 
Depth of boring to rock 
As given. 
- 2 
- 2 

4 
4. 50 
- 5.50 
4.50 
- 5.50 
5 
5. 16 
5.50 
- 6.50 
L50 
4.66 
- 5 
- 4 
3.66 
- 5 
5. 33 
- 4.50 
4.66 
- 5 
- 3 
3.50 
- 5.16 
5 
4.66 
5.50 
- 7 
6.16 
5.50 
7. 50 
8 
Referred 
to U. S. 
datum, 
Sandy 
Hook. 
Kind of rock, if known 
Rock in sight. 
Do. 
Do. 
Do. 
Rock or bowlder. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do, 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
