H0BBS.] 
FOUNDATIONS FOR SCHOOL BUILDINGS. 
75 
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 U. S. 
datum, 
Sandy 
Hook. 
Kind of rock, if known. 
Miscellaneous— Foundations for school 
buildings— Continued. 
65th street — 
1089 
225 feet east of Amsterdam 
avenue. 
-19. 08 
41 
"Gneiss." 
1090 
325 feet east of Amsterdam 
avenue. 
-25. 83 
37 
Do. 
1091 
100 feet south and 50 feet east of 
1087. 
-13.08 
50 
Do. 
1092 
Tenth avenue, corner 58th street. « 
- 6.58 
63 
Do. 
1093 
Corner 59th street 
- 3.16 
-27. 50 
- 9 
-16. 41 
70 
42 
64 
54 
Do. 
1094 
200 feet west of 1092 
Do. 
1095 
200 feet west of 1093 
Do. 
1096 
100 feet north and 100 feet west 
of 1092. 
Do. 
1097 
45th street, 225 feet east of Tenth 
avenue. h 
- 3.66 
29 
"Granite." 
1098 
325 feet east of Tenth avenue . . 
- 2.75 
30 
Do. 
1099 
58 feet north of 1097 
- 4.66 
- 8.08 
28 
25 
Do. 
1100 
58 feet north of 1098 
Do. 
1101 
28 feet north and 50 feet east of 
1097. 
- 1.50 
31 
Do. 
1102 
20th street, 300 feet west of First 
avenue. c 
—16. 25 
- 1 
Do. 
1103 
496 feet west of First avenue. . . 
-13. 83 
2 
Do. 
1104 
84 feet south of 1102 
-14.08 
-12.58 
-19. 75 
1 
2 
— 2 
Do. 
1105 
84 feet south of 1103 
Do. 
1106 
41 feet north of 19th street, 396 
feet west of First avenue. 
Do. 
1107 
15th street, 80 feet west of First 
avenue. d 
-23. 25 
- 2 
"Gneiss." 
1108 
16th street, 80 feet west of First 
avenue. 
-22 
- 4 
Do. 
1109 
82 feet north and 43 feet west of 
1106. 
-22. 08 
- 1 
Do. 
1110 
67 feet south and 40 feet west of 
1107. 
-26. 25 
— 7 
Do. 
a Datum of Nos. 1092-1096 is point on curb corner opposite boring. 
b Datum of Nos. 1096-1101 is point on curb 275 feet east of Tenth avenue. 
c Datum of Nos. 1102-1106 is point on 19th street curb 396 feet west of First avenue. 
d Datum of Nos. 1107-1110 is point on 15th street curb 80 feet west of First avenue. 
