320 OBSERVATIONS ON THE MAGNETICAL DIP, 
Newark, New Jersey, Ward’s Woods, on what is called “The Neck;” April 29, 1844. 
Calculated Total Intensity, 
Duration 
Dip. No.of | Epoch of commencing} of 500 | Tempe-| duration Square of the Horizontal|that at Cincin- 
Needle. Vibrations. Vibrations, |rature. at 60° preceding. Intensity.|nati being 1000. 
80° |1184.06)1401998.0836 |879.49 
77 «+5|1443.37/2083226.9569 |876.01 
74 5/1436.10)2062383.2100/878.19 
Mean,/877.10 992.61 
Deep marshy soil, with probably sandstone beneath, but at great depth. 
72°46/20"| 4 3h.49m.048.4 P}1185.6 
5 4 18 04 4 {1445.2 
6 4 49 07 0 [1488.58 
Poughkeepsie, New York, Latitude 41° 41’, N.; Longitude 73° 55’, W.; June 13, 1844. 
73°57'45"| 4 1h.21m.018.2 [1228.8 | 85°0)/1226.8 |1505038.24 |819.87 
5 1 53 04 8 |1495.2 | 84 0/1492.3 |2226959.2900/819.47 
6 2 19 00 4 |1487.6 | 84 0/1484.5 |2203740.25 |819.22 
Mean,|820.85 995.89 
Slate, very much distorted and inclined. 
Poughkeepsie, west side of the Hudson, opposite the town; June 13, 1844. 
In a ravine, and near to the highest part of the rocks, which are highly inclined and 
consist of thick beds of sandstone and slate. 
Greenbush, opposite Albany, about half a mile east of the village, June 14, 1844; Latitude 43° 39’, N.; 
Longitude 73° 44’, W. 
74°40'36"| 4 i1h19m0.019.2 A/|1252.00| '70°1(1251.08/1565201.1664|781.40 
5 {10 42 02 4 {1524.80] 70 |1523.'73/2321'753.1129|786.01 
6 {12 00 00 8 P/1518.00; 70 |1516.66)2300257,5556/787.38 
Mean,]|786.69 997.79 
Shale, but covered deep by diluvium. 
Albany, New York, Arbor Hill, three-quarters of a mile north-east of the State House; Latitude 42° 39’, N.; 
Longitude 73° 43’, W.; June 14, 1844. 
74°40/10"| 4 | 4h.58m.03s.2 P}1250.80| 75° |1249.58|1561450.1764/790.27 
5 |5 28 02 8 |1524.00) 75 |1522.40/2317701.7600/787.38 
6 |6 00 00 0 {1518.40] 73 |1516.67/2300287.8889]787.83 
Mean,|787.60 | 998.48 
Deep diluvium, of clay and sand. 
Utica, New York, Latitude 43° 07’, N.; Longitude 75° 13’, W.; June 16, 1844. 
1561900.0576|789.46 
74°48/49" 4 | 3h.57m.025.8 P\1251.02 78° 0|1249.76 
5 4 39 04 8 |1523.60) 76 0)1521.092316179.6100/787.90 
6 5 15 O1 6 |1518.80| 76 0)1516.66)2300257.5556/787.38 
Mean,|787.64 1007.80 
Deep alluvium, superimposed on slate. (?) In a meadow half of a mile from the town, not 
magnetic. 
Rochester, New York, Latitude 43° 08’, N.; Longitude 77° 51’, W.; June 17, 1844, 
~-74°38/48"| 4 | 5h.02m.03s.2 Pl1246.00| 77° |1244,6211549078.9444|795.79 
5 | 6 28 00 0 {1516.80| 76 |1515.11/2295558.3121/794.98 
6 | 6 55 02 B |1510.40) 65 |1509.74:2279314.8676/794.61 
Mean,|794.'79 1006.14 
