MJ8.1 
FOUNDATIONS OF TALL BUILDINGS. 
55 
Summary of records of borings made in New York and vicinity— Continued. 
2. BORINGS IN THE BOROUGH OF MANHATTAN— Continued. 
Serial 
num- 
ber. 
Location. 
Depth of boring to rock. 
Referred 
to U. S. 
Kind of rock, if known. 
As given. 
datum, 
Sandy 
Hook. 
Foundations of tall buildings — Cont'd. 
West of Fifth avenue— 
570/j 
00 feet on 17th street, north side 
- 20 
20 
Rock or bowlder. 
570 q 
184 feet west of 570 g 
-24 
15 
Do. 
570 r 
335 feet west of 570/ 
25 
14 
Do. 
570 s 
65 feet west of 570/ 
- 25 
14 
Do. 
570 1 
570 u 
220 feet on 19th street 
24 
21 
15 
18 
Do. 
320 feet west of 570 h. . . •. 
Do. 
570 y 
570.1- 
125 feet west of 570 t 
25 
21 
14 
18 
Do. 
400 feet west of 570 h 
Do. 
570*/ 
5702 
245 feet on 20th street 
- 18 
11 
Do. 
100 feet west of 570 y 
- 16 
23 
Rock. 
On Una of 31st street.a 
Near Ninth avenue — 
571 
20 feet east of east line (core) . . 
336. 1 
39 
Gneiss. 
572 
250 feet east of east line (core) . 
329. 4 
32 
Do. 
573 
500 feet east of cast line (core) . 
287.6 
-10 
Do. 
574 
740 feet east of cast line 
Near Eighth avenue — 
304 
6 
Do. 
575 
576 
90 feet east of east line 
290. 4 
290. 3 
- 7 
7 
Do. 
420 feet east of east line 
Do. 
577 
580 feet east of east line ------- 
304. 5 
/ 
Do. 
578 
740 feet east < >f east line 
On line ofS2d street. 
Near Twelfth avenue — 
313. 9 
16 
Do. 
579 
East side (core) 
1ST. 3 
-110 
Gneiss. 
580 
300 feet east of east line (core) . 
235.7 
- 62 
Do. 
581 
Bulkhead line (D-l) 
181.9 
289.6 
-116 
8 
Do. 
582 
Near Eleventh avenue, west line. 
Do. 
583 
East line 
289.8 
303 
— 8 
- 15 
Do. 
584 
300 feet east of east line 
Do. 
a Records 571-657 on 31st, 32d, 33d, and 34th streets reported by A. Noble and (has. M Jacobs, chief 
engineers. Depths referred to datum 300 feet below mean high water, except r>9/-620 and 629-bo4 
referred to mean high water. Nos. 574-578, 581-596. and 621-628 are borings by Davis calyx drill. 
