Magnetism in the United States, 15 



j; 



TABLE I — CONCLUDEP. 



Locality/, Oeology^ and remarlcs. 



112. In the Smithsonian Grounds. Affected by local attraction, changing -within the 

 enclosure as much as 1^°. Declination on Capital Hill, near Gilliss' Ptatiou, by 

 compass needle, 2° 25'. Ferruginous clay and sand overlying mica schist. 



113. West shore of Sinepuxent Bay, east of Berlin, Md. Ferruginous clay and sand. 



114. Near Petersburg, Virginia. 'Drift, ferruginous clay. 



115. Western point, mouth of Little river, Albemarle S'd, N.C. Tertiary clay and sand. 



116. On Albemarle Sound, east point of entrance into Currituck Sound. Alluvial 

 mud, sand, and shells. 



IIY. N. Carolina, near the beach, about 5 miles N.N.W. of light-house. White sand. 



118. 1 05 ft. E. and 26 ft. N. of centre of Capital dome. Granitic rock beneath the soil. 



119. On a lot adjoining Dr. Drane's residence, north side of Market street, Wilming- 

 ton, K. C. Tertiary clay, gravel, and sand. 



120. In the Capital square, near the southwestern corner. 



121. Near Georgetown, S. C. Alluvium. 



122. 85 yards southwest of Bibb county Male Academy. Clay. t 



123. On Sullivan's Island, Charleston entrance, S. C. White sand. 



124. Edisto Island, S. C Tertiary formation, alluvial mud, clay, and sand. 



125. On Hutchinson's island, iu range of Exchange and Presbyterian Church steeples, 

 near the second embankment from the river. Alluvium. 



126. Near the mouth of Savannah river, on a sand dune near the boat-house. 



127. Inside beach of Key Biscayne, light-house bearing S.W. Black mud, white sand. 



128. Near Key West, Florida. A small island on Florida reef, composed of detritus 

 of marine shells and coral. 



129. Cedar Keys, Fla., on liighest point of island. Drifted white sand on alluvial mud, 



130. In tlie salt marsh, about 400 yards north of the light. 



131. Apalachicola entrance, (eastern). White sea sand. 



132. Near Cape St. George, west entrance to Apalachicola bay, Fla. WHiite sea-sand, 



133. Florida. White sea-sand. 



134. St. Andrew's Bay, Florida. White sea-sand. 



135. 400yds. N.E. of N.W. bastion of Ft. Morgan, Mobile Ft, Ala. Drifted white sand. 

 13G. Mississippi. About a mile east of mouth of Pascagoula river, in the village, near 



shore. Tertiary formation, ferruginous clay and white sand. Dip observed in 1 848. 

 131. Near northeast corner of Capitol Square. Deep red clay. 

 1S8. Barataria Bay, Louisiana. Alluvium, covered with drifted white sand. 



139. Caillou Bay, La. Alluvium, covered with drifted while sand. 



140. On Galveston Bay, 10 miles northwest of Galveston. Texas. Simdy loam, 



141. Galveston Isd., 10 miles S.W. of Galveston, | mile from Gulf shore. Sandy loam. 



142. Four miles southwest of Quintana, Texas, near the beach. Drifted saucl. 



143. Near the mouth on the American side. Alluvium. 



144. California. At the Plaza near the "quarters." Yerj' coarse sandstone. The 

 high ridge of Point Loma is to the w^est. 



" At the Plaza, near the custom-house. 



145. Open plain, about 3 miles N. of San Pedro. Gi'avel.onbeds of recent fossil shells. 



146. Near mouth of valley of El Coxo. Rich soil. Hills show limestone, quartz, Ac. 



147. The surrounding hills are of soft limestone, resting on coarse red sandstone, 

 bearing enormous fossil remains, prt»bably of tertiary age. 



148. Near Monterey, Cal. Rich soil, on sandstone. Beach formed of granite bould 



149. Near the Presidio. Surrounding hills, limestone. 



150. On the beach. Sand and marsh. 



161. At the foot of the western part of the bluff, composed of ferruginous clay and 

 sand, resting on gravel, bearing fossil remains of clcphas primigenius. 



162. Near Cape Orford, Oregon. Geology very varied. South of Port Orfurd, coal 

 and plumbago. North, limestone, filled with fossil shells. 



153. On the beach ; white sand, mixed with black ferruginous and auriferous sand. 

 Surrounding hills, basalt. 



154. On the summit of the Cape. Horizontal columnar basalt. 



155. Near Cape Flattery, Washington Territory. Sand. Surrounding hills varied, 

 limestone principally ; basalt cropping out at Tatoosh island. 



166. On shore, opposite the island, near Cape Flattery, Washington Territory, 

 Sandstone and shales of coal measures. 



