324. OBSERVATIONS ON THE MAGNETIC DIP, 
Fort Lee, Station No. 4, about forty feet from each of the other stations, 2 and 8, westward, forming with them 
an equilateral triangle. 
; | Duration Calculated | | Total intensity, 
Dip. No. of | Epoch of commencing) of 500 |Tempe-| duration Square of the |Horizontal|that at Cincin- 
Neodle,, Vibrations, Vibrations.| rature, at 60°, preceding. Bendy wg being 1000. 
4 |10h.11m.028.4 A\1175.2 |81°S [1173.6 |1377336.96 | 895.24] 
The dip was not taken at this station, but it appears. the horizontal intensity was 
nearly the same as at No. 3. 
Fort Lee, Station No. 6, in an orchard, occupying the centre of the recess in which the village has been built. 
Here the trap rock is wanting, and a deep stratum of drifted sand rests on the subjacent sandstone. 
72°39'15" | 4 | 1h.57m.01s.6 | 1182.4 | 80° | 1180.86 | 139443033.96 | 884.27] 994.13. 
The following diagram shows the curves of dip and intensity on traversing the lower 
precipitous termination of the Palisades from south to north. 
2d 
mn g 
QL rk 5 
“~ ! 1 ah 
A i 5 
40\PALISADES' of: The HUDSON. {1020 
feat 
bi; dy 
|_20 Sar 1010 
Bis 
Ar 
73,00 = A 1000 
ae 
IS 
1 
1 
« 
1 
: 
: 
t 
‘ 
¢ 
: 7 
Z 
‘ 
F 
7 
F 
Q 
E. 
2 
Lee 
al 
ko 
ko 
Io 
tt; Lee 
ERT + RES ORs 4 980 
Village. 
TO Hl 
i 
Sowth. Worth 
970 
Patterson, New Jersey, Latitude 40° 56’, N ; Longitude 74° 10’, W.; June 9, 1844 
~-75°00/30" | 4 | 6h.00m.918.6P | 1268.00 | 75° | 1260.70 | 1604680.8976 | 768.41 | 995.17 
The above result was obtained on Garret Rock, which consists of columnar trap rock, 
say one hundred and fifty feet high, superimposed on sandstone, nearly horizontally 
stratified. ‘The station was on the terraced top of the rock, about one hundred feet south 
of its precipitous northern termination. 
Patterson, at the top of the hill of which Garret Rock is a part; June 10, 1844, 
830.21 and 1005.46. This station was about five hundred yards southwardly from Garret Rock. 
| 
| 
| 
| 
| 
/ 
| 
| 
