690 



General Index. 



Sienite, its mineral contents, . ... 461 



its theory, .... 462 



Siliceous Slate, .... 262 



Silliman Prof, his opinion of the Connecticut Valley, 239 



his account of greenstone near Hartford. 429 



Silver in galena at South Hampton, . 65 



Sketches of Scenery, ... . .108 



Smith's Point, its gain upon the sea, . . .' 129 



Dr. David, S. C. H. his Catalogue of Reptiles, . 552 



Dr. Jerome V. C. do of Fishes, . 553, 597 



Soils, their origin, . . 4 



Somerset Vt. iron mine with native gold in, ., 54 



Spangled Mica Slate, . . .327 



Specimens of Rocks and Minerals for the Government, 3, 540 



Specular oxide of Iron, . . . 449, 508 

 Sphene, . . . . 310, 381, 398 



Spiders in the United States, Catalogue of, . 564 



Spinelle, . . . . 310 



Spodumene, ..... 50, 503 



State House, view from, . 92 



Staurotide, .... 327, 345 



Staurotidiferous Mica Slate, . . 327 



Steatite, its agricultural character, .' . 10 



its localities and econorm^al uses, . . 31 



other facts concerning it, . . 353, 371 



Stilbite, . . ... 347,399 



Stratified Rocks, . .... 114 



Submarine Forests . . . .117 



Sulphur in mica slate, . . . 347 



Sulphuret of Iron, .... 398 

 Sulphate of Baryta, . . 501, 433, 231, 49, 462, 507 



ofStrontia, . . .232 



Sulphuret of Molybdenum, . . . 397, 509 



Sunderland Cave and fissure, . . . 104 



Systems of Strata in Massachusetts, . . 525 



oldest Meridional, . . • 525 



the Trap System, . . 528 



latest Meridional, . . • 530 



N. E. and S. W. System, . 531 



E. and W. System, . . 534 



N. W. and S. E. System, . . 535 

 T. 



Talc, ..... 311, 362 



and Serpentine their relation, . . . 372 



Talcose Slate, its agricultural character, . . H 



its economical uses, . • 23 



its definition, . . . 352 



its mineralogical characters, . . 353 



its topography, . . . 355 



dip, direction, &c. of its strata, . 358 



| its mineral contents, • • 359 



the repository of Gold, • ~ • 360 



its theory, . • • 364 



Tellhm. fossil at Gay Head, . . . .196 



Tertiary Formations, their agricultural character, . 7 



their history, . • 172 



