Magnetism hi the XTniUd States. 11 



TABLE I. — CONTINfED. 



Locality^ Geology^ and remarks. 



88. Oa Cluppaquiddick Isknd, opposite Edgiirtown, MartWs Vineyard. Drift. 

 S9. On the r^orth beach, near the edge of the town, due N. from MitchelVs Obs't j. Drift, 

 " Argillaceous sand, overljing a stratum of clay, resting on gneiss. 



40. South Kingston, Rhode Island, in a field near the angle of the roads to Kingston 

 and Wickford. 



41. loo yards towards Beavertail h'ght, 



42. In the rear of Brown University, 198 feet from the central building. Quartz 

 and gneiss rocks atid mica schist. 



43. Half a mile north of Watch Hill lights, near Stonington, Conn. Granitic gneiss. 



44. Connecticut. Reddir^h granitic gneiss. 



45. Near New London, Conn. Whitish felspathic gneiss, with mica seams. 



46. Connecticut. Granitic gneiss. 



47. In Southold, Long Island. Drift. 



48. Connecticut. Reddish granitic gneiss. 



49. Near New Harefi, Connecticut. Trap. 



50. Near New Haven, in the meridian of Yate College Observatory. Trap. 



" On Howard ayemie, 503 feet from high-water mark, on foot of the avenue. Ar- 

 gillaceous soiL 



51. Near Pavilion hotel. Sandstone, underlying drift. 



52. Greenstone and chloritic slate. 



53. Connecticut. Gneiss and mica slate. 



54. Connecticut. Gneiss and mica slate, 



55. Connecticut. On Judge Isaacs* hiU. Granite. 



56. Connecticut. In the rear of the Union Hotel. Granite. 



57. Steamboat landing at Fort Chester, Westchester county, New York. Gneiss. 



58. Near Drowned Meadow village, north shore of Long Island. Drift and alluvium. 



59. Huntington, Long Island. Drift, -^ith boulders. 

 €0. North shore of Long Island. Drift. 



61. About 100 yards south of the Neptune house, in New Rochelle, Westchester 

 county, New York. Gneiss and hornblendic rocks. 



62. Forty yards E.N.E. from Sands' Point light. Drift, covered with alluvium. 

 Near the light-house. 



63. In a cove north of Riker s Isl'd., Long Island Sound. Gneiss, covered with alluviumif 



64. Opposite Albany, N. Y., near Second street, east of the Hudson River railroad 

 track. Clayey sand and dark blue marl. 



65. Near the Hudson river, on a bluff close to the villa<je. Granite. 



66. Manhattan Island. Gneiss rock, underlying the soil. 



67. City of New York. Gneiss rock, underlying drift, loam and gravel. 

 City of New York. 



68. New York harbor, between Fort Columbus and Castle Williams, in range with 

 Trinity Church steeple and Battery flag-staff. Quartzose sand, overlying mica 



schist and granite. 



69. New York harbor, north side of island, to the northward of the flag-staff. 

 Quartzose sand, overlying metamorphic rock. 



70. City of NeAv York/inside the receiving reservoir, near corner of 79th street and 

 7th avenue. Gneiss. 



71. New Jersey. Alluvial soil, sand, and gravel, superimposed on secondary red 

 sandstone in place. 



72. IS ear Brooklyn, L. L Drift, with small boulders of granite and tfap. 



73. In Westfield, southwestern part of Staten Island. Drift, with small boulders. 



74. 250 yards north of light. Greensand formation; alluvial sand. 



" About 250 feet west of the light-house, on the top of a dune. Tlie Hook con- 

 sists of downs, and the quartz sand was found 25 feet deep. 



75. About five miles west uf Princeton, N. J., in a field near the house of Mr. Thos. 

 Hunt, Trap rock protruding through secondary red sandstone. 



76. Near Bordentown, N. J., on the bank of the Delaware river. Cretaceous marl. 



77. At Prof. Vanuxcm's, 2 miles above Bristol, on the Delaware river, 100 yards N.W. 

 of the canal. Sand, clay, and gravel, superimposed on metamorphic rock. 



