INDEX 



321 



Section in Patapsco formation, 154. 

 Section near Principio Creek, 155. 

 Section at Pumping Station Well, 



Elkton, 153. 

 Section in Raritan formation, 156. 

 Section at Turkey Point, 172. 

 Section in Wicomico formation, 172. 

 Sedimentary record of Aquia forma- 

 tion, 177. 

 Sedimentary record of Columbia 



group, 179. 

 Sedimentary record of the crystal- 

 line rocks, 173. 

 Sedimentary record of Lafayette 



formation, 178. 

 Sedimentary record of Potomac 



group, 174. 

 Sedimentary record of the Upper 



Cretaceous, 176. 

 Serpentine, 93, 94, 131, 134. 

 Serpentine, analysis of, 138. 

 Shaler, N. S., 54. 



Shattuck, G. B., 19, 31, 44, 62, 63, 149. 

 Shore timber, 300. 

 Simpcoe, J. F., 208. 

 Simpress, Chas., 209, 210. 

 Singerly, 155, 181. 

 Singleton, H. K., 56. 

 Sioussatt, St. George L., 61. 

 Slate, 103. 



Smith, Anthony, 34, 197. 

 Smith, Capt. John, 26, 32, 49, 218. 

 Smock, J. P., 55, 56. 

 Snowfall, 260. 

 Snowfall, monthly and annual depth 



of, 261. 

 Soapstone, 93. 

 Soils of Cecil county, 227. 

 Soil formations, 229. 

 Southern gabbro belt, 128. 

 Steatite, 95. 



Stone Run, 121, 124, 222. 

 Stoney Run, 91. 



Stoneware clay, analysis of, 208, 209. 

 Stoneware clays in Cecil county, 



207. 

 Streams of the Piedmont Plateau, 



origin of, 78. 

 Structural relations and age of the 



crystalline formations, 103. 

 Structure of the Atlantic Coastal 



Plain, 68. 

 Structure of the Peidmont Plateau, 



71. 

 Sudworth, G. B., 295. 

 21 



Sunderland formation, 149, 170, 181. 



Sunderland stage, 74. 



Sunderland terrace, 182. 



Susquehanna clay, analysis of, 248. 



Susquehanna clay discussed, 246. 



Susquehanna clay, products of, 247. 



Susquehanna gravel, analysis of, 

 244. 



Susquehanna gravel, discussed, 243. 



Susquehanna gravel, products, of, 

 244. 



Susquehanna, origin of name, 86. 



Susquehanna river, 34, 47, 70, 86, 

 263, 272-287. 



Susquehanna river, monthly dis- 

 charge of, 282, 283, 286, 287. 



Sutton, Geo. W., 215. 



Summary of the crystalline rocks, 

 142. 



Swank, J. M., 56, 219. 



Swedenborg, Emanuel, 49. 



Sylmar, 97, 101, 112, 132, 133, 218. 



Table showing average daily, 

 monthly and annual range and 

 absolute monthly and annual 

 range of temperature, 256. 



Table showing daily gage height of 

 Octoraro Creek, 268, 271. 



Table showing daily gage height of 

 Susquehanna river, 276, 277, 278, 

 279, 280. 



Table showing highest observed 

 temperatures, 255. 



Table showing lowest observed tem- 

 peratures, 255. 



Table showing magnetic declina- 

 tions, 289, 292. 



Table showing mean monthly and 

 annual temperatures, 253. 



Table showing monthly and annual 

 depth of snowfall, 261. 



Table showing monthly discharge 

 of Octoraro Creek, 267. 



Table showing possible yield of 

 shore timber, 311. 



Table showing precipitations, 258. 



Table showing relative abundance 

 of species in the Barrens timber, 

 299. 



Table showing the relative abund- 

 ance of different species in the 

 shore timber, 301. 



