DIP AND STRIKE OF STRATA, 
607 
Vertical ....... 
Westward 80° . 
Gneiss and drift scratches 
Gneiss and drift scratches 
full of veins and very tor¬ 
tuous 
Gneiss in a state of rapid 
disintegration 
In the second battery, 200 or 300 yards east of the 
last. 
In the third battery southeast of the preceding. 
In the fourth battery southeast of the last. This is 
whicl 
the city. 
On hill on the Eighth avenue. 
At 97th-street and 80th to 98th-street near the rail¬ 
road track. 
At 96th to 95th-street, east side of track. 
At 95th to 94th-street, do do 
At 93rd to 92nd-street, do do 
About 20 rods south of the last. 
At 86th-street. 
At 84th-street. 
At 84th to S2nd-street. 
At 76th to 75th-street. 
Westward 45° to 50° . 
Westward 80° .. 
Gneiss not sound enough for 
working 
Gneiss fast disintegrating.. 
Gneiss with large veins o 
Gneiss, ferruginous . 
Gneiss, sound and full of 
quartz veins. 
Gneiss abounding in tort 
ous granite veins, and c 
vered by drift grooves 
Gneiss and drift grooves 
N25°E ., 
do 
N45°E.. 
80° to 45° . 
45° .... 
45° to 80‘ 
Gneiss, disintegrating from 
containing pyrites 
Gneiss . 
Nearly vertical .. 
Average vertical . 
Westward 45° .. 
do 
N25°E .. 
N30°E.. 
N45°E .. 
'do 
68N40°E.. 
69N35°E., 
70N25°E.. 
7i1N35°E ., 
do 
75° . 
45 to verti¬ 
cal and 45° E. 
Westward 75° . 
do 75° to 80° 
Corner of Fourth avenue and 16th-street. 
Twenty-five rods west of Fourth avenue and 25th- 
street. 
Railroad cut, where horses are replaced by steam, 
32d to 37th-street. 
53d-strcet, on railroad line. 
79th-street to the tunnel; strata much confused in the 
southern part of this space. 
do with drift grooves, 
N_25° W 
Gneiss .. 
Gneiss and drift grooves , 
I20th-street, railroad line. 
On the railroad at 129th-street. 
,On Third avenue at 104th and 105th-streets, near 
Harlem creek (not Harlem river). 
On Third avenue from 105th to 94th-street; in many 
places on the east side. 
On Third avenue, from 94th to 79th-street, on east 
and west sides. 
On Third avenue, between 49th and 50th-streets, 
ten rods east and one rod west of the avenue. 
On 47th-street, thirty rods east of Third avenue. 
From 79th to 44th-street rock emerges generally on 
the top of the knolls. 
At 43d-street grooves on both sides of the avenue 
N 25° W. 
On Third avenue, from 42d to 44th-street. 
do from 34th to 35th-street. 
On Second avenue, east side and I6th-street. 
On Third avenue, do do 
On Fourth avenue, do do 
Between Third avenue and East river at 22d-street. 
