684 General Index. 



Graywacke, classical, - 

 slaty, 



amphibolic, - 



limestone, 



its topography, 



dip, direction &c. of its strata, 

 section in at Newport, 

 its mineral contents, 

 its theory, 

 Green River a change in its bed, 

 Green Sand, - - - 



Greenstone, its agricultural character, 

 its uses in architecture, 

 porphyritic, used for ornament, 

 defined, - 

 its mineralogical characters, 

 columnar, 



porphyritic and amygdaloidal, 

 concreted and tufaceous, 

 its topography, 



its position with respect to other rock 

 its veins or dykes, 



its chemical effects upon other rocks, 

 its mineral contents, 

 its theory, 



in new red sandstone, when protrudei 

 H. 



Harris, Dr. T. W. assistance from, 



his catalogue of Insects, 



Hawley Iron Mine, 



Height of Hills around Boston, 



Hentz, Professor, his Catalogue of Spiders, 



Hematite, iron ore, - - 



Heulandite, - - - 



Holyoke, mount, ... 



Hornblende crystalized, - 



Hornblende Slate, its agricultural character, 

 used for flagging stones, 

 Dr. Macculloch's view of, 

 its mineralogical characters, 

 porphyritic, 

 its topography, 

 dip and direction of its strata 

 its mineral contents, 

 its theory, 

 Rock, - 



Hornstone, - - 



Hubbardston, copperas manufactured in, 



Huttonian Theory, - 



Hydrate of Iron, - 



Hypersthene, - 



I. 



Icthyolites in new red sandstone, 

 Ice, how it removes bowlders, 



floods, their excavating power, 

 Idocrase in Worcester, 

 Indicolite, - 

 Inscription on Quartz rock, 

 Insects, Catalogue of in Massachusetts, 

 Iolite, - 



Iron, native, - - - 



carbonate of, 







ge7 

 *D / 







4iOO 



















2fi8 







271 







274. 







27^ 













117 







185 







12 







20 







21 







404 













406 



- 



- 



410 







412 







412 







417 





- 



419 





- 



429 





■ 



4oo 





■ 









94*? 



- 





544 





- 



566 





- 



53 





- 



85 







564 



- 





56, 323 





- 



347 





- 



78 





- 



363 





- 



11 







20 





- 



373 





- 



374 



- 



- 



375 





- 



377 







380 





- 



381 







381 





- 



375 







503 







53 







515 



178, 



188, 



2yo, 396 





■ 



461 





- 



- 



236 

 124 







139 







346 







504 







121 







566 







507 







347 





52, 



348, 362 



