684 General Index. 



Graywacke, classical, 857 



slaty, - 258 



amphibolic, - 259 



limestone, 2fl7 



its topography, 2g 



dip, direction &c. of its strata, 271 



section in at Newport, 2-74 



its mineral contents, - 275 



its theory, - 2g5 



Green River a change in its bed, 137 



Green Sand, 185 



Greenstone, its agricultural character, 12 



its uses in architecture, 20 



porphyritic, used for ornament, 21 



defined, 4<)4 



its mineralogical characters, 4()5 



columnar, ; 406 



porphyritic and amyg-daloidal, 410 



concreted and tufaceous, 



ita topography, i.J*" 412 

 its position with respect to other rocks, 



its veins or dykes, 419 



its chemical effects upon other rocks, 429 



its mineral contents, ,. - 433 



its theory, - 439 



in new red sandstone, when protruded, 243 



H. 



Harris, Dr. T. W. assistance from, -, -: 544 



his catalogue of Insects, - - 566 



Hawley Iron Mine, - - 53 



Height of Hills around Boston, . -, ~ - 85 



Hentz, Professor, his Catalogue of Spiders, - 564 



Hematite, iron ore, - - - 56, 323 



Heulandite, - 347 



Holyoke, mount, 78 



Hornblende cryetalized, ^ 363 



Hornblende Slate, its agricultural character, - 11 



used for flagging stones, . - 20 



Dr. Macculloch's view of, - 373 



its mineralogical characters, - 374 



porphyritic, - - 375 



its topography, 377 



dip and direction of its strata, 380 



its mineral contents, - -. < 381 



its theory, - .381 



Rock, - - 375 



Hornstone, 503 



Hubbardston, copperas manufactured in, - 53 



Huttonian Theory, - 515 



Hydrate of Iron, 178,188,296,396 



Hypersthene, - 461 



I. 



Icthyolites in new red sandstone, - 236 

 Ice, how it removes bowlders, 



floods, their excavating power, 



Idocrase in Worcester, - . 346 



Indicolite, - 504 



Inscription on Quartz rock, " 121 



Insects, Catalogue of in Massachusetts, - 566 



lolite, 507 



Iron, native, 347 



carbonate of, 52, 348, 362 



