GENERAL INDEX. 



A. 



Page. 



Aboriginals, their geological speculations, ... 203 



Adularia, 51, 398 



Actynolite, ----- 342,397,363,398 



Agates, ------- 50, 435 



brecciated, ----- 322, 344 



Alum Hill, ----- 77 



native, ------ 48,342,397 



Allochroite, - - - - - 313 



Alluvium, - - - - - 5, 114 



of rivers, - v - - - 115 



of the coast, - - - - 116 



of disintegration, - 120 



of degradation, - 121 



Amber, ----- 51, 191 



Amethyst, ----- 503, 435 



Amianthus, - 311, 312, 371 



Amphibolic mica slate, - 327 



Amygdaloid, - - - - - - 411 



Analcime, - 347, 436 



Andalasite, ------ 291, 345 



Animals in Massachusetts, Catalogue of - - - 543 



Animal Fossil in new red sandstone, - 235 



Anthophyllite, ------ 399 



Anthracite, its geological position, - 335 



in Rhode Island and Worcester, - - 44 



in graywacke, ----- 275 



in new red sandstone, - 227 



in Portsmouth, R. I. - - - 276 



in Wrentham, Middleborough, &c. - - 277 



in mica slate, ----- 347 



passing into plumbago, - 279 



its origin, ----- 281 



Anthracitous Mica Slate, - - - - 329 



Arcade in Providence, its granite pillars, - 16 



Argentine, - 502 



how produced in Williamsburgh, - - 307 



Arenaceous Mica Slate, - 328 



Argillaceous Slate, its economical uses, - - - 34 



of Worcester County, - - 288 



of Franklin and Berkshire, - - 289 



its place among the rocks, - - 286 



its mineralogical characters, - - 287 



dip and direction of its strata, - 289 



its mineral contents, - - 291 



associated with graywacke, - - 258 



its agricultural character, - - 9 



disturbances among its strata* - 291 



its theory, ... - 294 



