38 
ROCK FLOOR OF GREATER NEW YORK. [mi.i.27ol| 
Summary of records of borings made in New York and vicinity — Continued. 
1. BORINGS BENEATH CHANNELS ON WATER FRONT— Continued. 
Location. 
Depth of boring to rock. 
Kind of rock, if knowrAJ 
Serial 
num- 
ber. 
As given. 
Referred 
to U. S. 
(latum, 
Sandy 
Hook. 
HUDSON RIVER FRONT — continued. 
Bulkhead line — Continued. 
Pier — Continued. 
186 
38 (old), near Huberl street ... 
- 80.11 
- 83 
Granite. 
187 
Desbrosses street 
81.36 
- 84 
Do. 
188 
42 (old), near Canal street 
SO. OS 
- 82 
Do. 
189 
15 (old), near Charlton street.. 
86. 17 
- 89 
Mica-schist. 
190 
49 (old), near Leroy street 
85.90 
- 88 
Do. 
191 
51 (old), Christopher street 
-124 
-126 
Do. 
192 
Fool <»f Bethune street 
-157.97 
L60 
Granite. 
L93 
60 (old), toot of 13th street 
196 
No rock. 
L94 
Foot of 23d streel 
-175. 16 
110.11 
84. 78 
91.79 
28. ss 
-177 
152 
87 
07 
31 
< iranite. 
Do. 
Do. 
Do. 
Do. 
L95 
30th street 
196 
38th street 
197 
Kith streel 
198 
57th streel 
At < '"/.- Of pit rs.'t 
Pier— 
199 
I (ne^ 2i 
50. 7 
53 
200 
3 (new ) 
45. 1 
15.3 
16.9 
Hi. s 
13. 2 
- 48.6 
61. 1 
- 64 
- 50.2 
- 71.1 
73 
48 
is 
- 49 
- 49 
- 46 
- 51 
(Y.\ 
- 66 
53 
- 74 
75 
201 
6 (new) 
202 
8 (new) 
203 
11 (new) 
204 
12 (new) 
205 
24 (new 15) 
206 
28 (new 18) 
207 
30 (new 20) 
208 
35 (new 24) 
209 
39 (new 29) 
210 
42 (new 33) 
211 
45 (new 37) 
Miscellaneous.^ 
Bulkhead line north of crib- 
68. 6 
- 71 
212 
Center lineof 135th street (pro- 
duced). 
- 90 
- 92 
No rock. 
213 
160 feet north of 135th street .. 
81 
- 83 
ho 
^5 USSe v' ,■ C V Annala N ew York Acad Sci., vol. 2 1882, pp 66-77. 
™»« ™* i lepa r tnu ' m of docka No - 212, average of two borings 10 feel apart. 214 221 from 
piling, 2>b and 228 from series of 24 borings— 226 on line z z, 228 on line u-u. 
