316 



INDEX 



Briek and terra cotta clays in Cecil 



county, 206. 

 Building-stone, 196. 

 Bull Mountain, 27, Q6, 166, 168, 171, 



209. 

 Bureau of Forestry, 295. 

 Burnaby, Andrew, 49. 



C. 



Cabin John Creek, 157. 



Calciferous, 104. 



Caldwell, H. W., 266. 



Calvert, 89, 93, 289. 



Calvert formation, 149. 



Calvert, magnetic station at, 299. 



Carey, M., 49. 



Carpenter, Geo. W., 50. 



Carpenter Point, 208. 



Cassidy Wharf, 160, 161, 162. 



Cecil clay discussed, 233. 



Cecil clay, products of, 234. 



Cecil loam, analysis of, 231. 



Cecil loam discussed, 230. 



Cecil loam, products of, 232. 



Cecil mica loam, analysis of, 236. 



Cecil mica loam discussed, 235. 



Cecilton, 241. 



Charcoal and cordwood, 308. 



Charlestown, 206, 246. 



Cherry Hill, 151, 152. 



Chesapeake City, 151, 154, 156, 157, 



160, 241, 243, 245, 246. 

 Chesapeake group, 149. 

 Chestnut Hill, 93, 128. 

 Chester, Frederick D., 56, 58, 129. 

 Childs, 92, 155, 181, 182. 

 Choptank formation, 149. 

 Christiania Creek, 235. 

 Chrome ore, 96, 221. 

 Clark, W. B., 42, 43, 44, 45, 58, 59, 



60, 62. 

 Clay of Cecil county, 204. 

 Cleaveland, Parker, 37. 

 Climate, 249. 



Coastal Plain in Cecil county, 64. 

 Coastal Plain rocks, history of, 150. 

 College Green, 91. 

 Colora, 101. 

 Columbia group discussed, 46, 149, 



169. 

 Columbia group, sedimentary record 



of, 179. 

 Commercial trees discussed, 304. 

 Concord, 241. 



Conifers, list of, 302. 



Conowingo, 94, 100, 102, 113, 121, 

 132, 134, 135. 



Conowingo barrens, analysis of soil 

 of, 238. 



Conowingo barrens discussed, 236. 



Conowingo clay, analysis of, 239. 



Conowingo clay discussed, 238. 



Conowingo clay, products of, 238. 



Conowingo Creek, 28, 34, 79, 86. 



Conowingo, flint mill at, 217. 



Cook, Geo. H., 41, 44. 



Conrad, T. A., 45, 53. 



Cordwood, 308. 



Cowden, Wm. L., 210. 



Crystalline formations, areal distri- 

 bution and character of, 87. 



Crystalline formations, petrography 

 of, 113. 



Crystalline formations, structure 

 and age of, 103. 



Crystalline rocks of Cecil county 

 defined, 84. 



Crystalline rock-forming stage, 71. 



Crystalline rocks of the Piedmont 

 Plateau, 39. 



Crystalline rocks, sedimentary re- 

 cord of, 173. 



Crystalline rocks, summary of, 142. 



Curran, H. M., 21, 295. 



Cypress stumps, 184. 



D. 



Daily, monthly and annual range of 



temperature, table, 256. 

 Dale, T. Nelson, 84. 

 Dana, E. S., 58, 96. 

 Darton, N. H., 42, 44, 45, 47, 58, 59, 



60. 

 Day, D. T., 57, 58, 59. 

 Description of Magnetic stations, 



289. 

 Dean, I. R., 216. 

 Desor, E., 53. 

 Diabase, 100, 140. 

 Diabase, analysis of, 141. 

 Dike rocks, discussed, 135. 

 Dikes, micro-granitic, 139. 

 Dike rocks and other intrusives in 



the granite-gneiss, 97. 

 Discharge measurements on Octo- 



raro Creek, 271, 272. 

 Discharge of Susquehanna river at 



Harrisburg, 284. 



