General Index. 



687 



Native alum, .... 342, 397 

 arsenic, ..... 191 



gold, •'. .• . . 359,459 



copper, ..... 433 



Nauset Beach, its gain upon the sea, . . . 128 



Nephrite, . . . . 311, 312 

 Nevropteris in graywacke, .... 284 



New Bedford seen from its harbor, ... 94 



New red sandstone, its agricultural character, . . 8 



its uses and quarries, . . .35 



in the Connecticut Valley, . . 206 



proofs of its occurrence there, . . 207 



its mineralogical characters, . . 209 



its topography, . . . 216 



of New York, Nova Scotia, . . 217 



of New Jersey, . . . 529 



its dip, direction, and thickness, . .219 



its mineral contents, . , 225 



its theory, . . . 241 



Noachian Deluge, . ... . 142, 166 



Nodular argillaceous iron ore, . . . 188 



Northeast and Southwest System of Strata, . t 531 



Northwest and Southeast Do. . . . 535 



Nuttallite, ..... 284 



O. 



Ochres, their localities and uses, . . .58 



Ochrey Brown Oxide of Iron, . . , 190 



Old Red Sandstone, whether it exists in Massachusetts, 207 



Ophicalce Grenue, . . . . ,312 



Organic Remains, in plastic clay, . . . 191 



in new red sandstone, • . 232 



in graywacke, . . . 284 



Orthocera in new red sandstone, . . . 237 



Osseous Conglomerate, .... 186 



Oxide of manganese, how produced, . . 123 



of tin, . .... 509 

 P. 



Pargasite, . . 1 . . . 310 



Part IV. . . . . , .543 



Peat, its localities and uses, .... 39 



its extent in Nantucket, . . . 1 19 



theory of its production, . . . .118 



Pecopteris in graywacke, . . . 284 



Pelham, (N. H.) granite in • . . 16 



Peliom, ..... 399, 507 



Petalite, lithia in . . . .50 



in limestone, . . . . 310 



Phosphate of lime, . . . 502, 343, 310, 396 



of manganese, .... 569 



Pimelite, . . . . . .372 



Pinite, ..... 345, 503 



Pisiform argillaceous iron ore, . . . 190 



Plants in Massachusetts, Catalogue of • • 599 



Plastic Clay, its history, . . . .184 



its mineralogical characters, , . 184 



its organic remains, . . . 191 



its mineral contents, . . . 188 



dip, direction, thickness, of its strata, &c. . 196 



its theory, ' . . . .202 



on the Vineyard, , 184 



on Nantucket, . . . .197 



in Truro and Duxbury, . . .199 



