46 
ROCK FLOOR OF GREATER NEW YORK. 
[BULL. 270. 
Summary of record* of borings made in New York and vicinity — Continued. 
2. BORINGS IN THE BOROUGH OF MANHATTAN— Continued. 
Location. 
Line of subway, on Lexington avt nue—Con. 
31s1 street 
32d street 
33d street 
34th street 
35th street 
36th street 
37th street 
38th street 
39thstree1 
40th street 
Hsl si reet 
r.< 1 st reet 
44tli street 
45th st reet 
1*51 li street i L20 feel cast) 
47tli street 
Halfway between 48th and 49th 
streets. 
I9thstree1 
50thstree1 
51st st reet 
52d street 
53d street 
54th street 
55th street 
56th street 
57th street 
58th street 
59th street 
60th street 
61 st street 
62d street 
63d street 
64th street 
65th street 
66th street 
Depth of boring to rock. 
As given. 
-33 
6 
li; 
9 
L3 
12 
- 3 
3 
L5 
- 8 
-10 
-13 
-18 
I. 
1 
i:, 
I 
3 
3 
24 
- 3 
- 5 
- 5 
is 
27 
-34 
-33 
-18 
-26 
-11 
-13 
-12 
-17 
41 
-26 
Referred 
to U. S. 
datum, 
Sandy 
Hook. 
3 
24 
19 
34 
43 
51 
61 
61 
40 
43 
34 
32 
28 
42 
45 
31 
47 
46 
15 
22 
39 
38 
38 
25 
13 
27 
21 
37 
38 
40 
37 
16 
41 
Kind of rock, if known. 
9 Rock. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
