RIVERSIDE PARK EXTENSION. 
61 
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. 
Serial 
num- 
ber. 
As given. 
Referred 
to V. S. 
datum, 
Sandy 
Hook. 
Kind of rock, if known. 
733 
734 
735 
736 
737 
738 
739 
740 
741 
742 
743 
! 744 
745 
746 
747 
748 
749 
i 750 
751 
752 
753 
754 
\ 755 
756 
757 
758 
759 
760 
761 
762 
763 
764 
765 
766 
Riverside Park extension — Continued. 
Twelfth avenue — Continued. 
10 feet north of 732 
- 8.50 
-12.50 
— 9.66 
— 9 
- 7.50 
— 7 
— 6 
- 5.50 
-13. 33 
10.33 
- 7.33 
6.50 
i 
- 8.50 
-10. 16 
- 8.66 
-12. 33 
-15 
8.33 
12.50 
-15.66 
-16 
-14.50 
-12 
-14. 50 
-19.16 
-17.50 
-18.50 
—21. 50 
-19. 50 
-15 
-10.50 
- 9.16 
- 2 
3 
- 1 
2 
3 
4 
5 
6 
6 
- 1 
2 
5 
5 
5 
3 
2 
3 

- 3 
4 
- 1 
- 4 
- 4 
- 3 

- 3 
- 7 
- 6 
— 7 
-10 
- 9 
- 3 
- 1 
3 
10 
25 feet north of 733 
Do. 
Do 
50 feet north of 734 
Southeast corner 145th street . . 
25 feet north of 736 
Do. 
Do 
5 feet north of 737 
25 feet north of 738 
Do. 
Do. 
5 feet north of 739 
Do. 
25 feet north of 740 . r. 
Do. 
25 feet north of 741 
Do. 
Northeast corner 145th street . . 
25 feet north of 743 
Do. 
Do. 
25 feet north of 744 
Do. 
25 feet north of 745 
Do. 
100 feet north of 743 
Do. 
25 feet north of 747 
Do. 
25 feet north of 748 
Do. 
25 feet north of 749 
Do. 
146th street 
Do. 
50 feet north of 751 
Do. 
25 feet north of 752 
Do. 
100 feet north of 751 
Do. 
25 feet north of 754 
Do. 
25 feet north of 755 
Do. 
147th street 
Do. 
25 feet north of 757 
Do. 
25 feet north of 758 
Do. 
100 feet north of 757 
Do. 
50 feet north of 760 
Do. 
148th street 
Do. 
25 feet north of 762 
Do. 
25 feet north of 763 
Do. 
25 feet north of 764 
Rock in sight. 
100 feet north of 762 
Do. 
