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, . '. . . . . a 310 



Spodumene, . . v,* >,. ' ,<w< . 50,503 



State House, view from, . . . 92 



Staurotide, .... 327, 345 



Staurotidiferous Mica Slate, . . 327 



Steatite, its agricultural character, ." 10 



its localities and economical 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 



of Strontia, . . . . 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, . . . . :V. 311,362 



and Serpentine their relation, . . , . 372 



Talcose Slate, its agricultural character, . . 11 



its economical uses, . . 23 



its definition, . . .352 



its mineralogical characters, . . 353 



its topography, . . n'' 355 



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



1 its mineral contents, . . 359 



the repository of Gold, . . 360 



its theory, ... 364 



Tellina^. fossil at Gay Head, . . .196 



Tertiary Formations, their agricultural character, 



their history, . . 172 



