GENERAL INDEX. 



A. 



Page. 



Aboriginals, their geological speculations, - 203 



Adularia, - - ' % *J 



Actynolite, - - 342,397,363,398 



Agates, - - 322344 



brecciated, J ^> **J 



Alum Hill, - 77 



native, - - > J4 4 & 



Allochroite, ' - *{ 



Alluvium, 5 > JJ 



of rivers, 



of the coast, 



of disintegration, 



of degradation, 



----- Ol| 191 



- - - ' 503,435 



- - 311,31*371 



Amphibolic mica slate, 



Amygdaloid, 411 



Analcime, 347, 436 



Andalusite, - & l * 345 



Animals in Massachusetts, Catalogue of 543 



Animal Fossil in new red sandstone, 



Anthophyllite, 



Anthracite, its geological position, 



in Rhode Island arid Worcester, 



in graywacke, - 275 



in new red sandstone, ' - 

 in Portsmouth, R. I. 

 in Wrentham, Middleborough, &c. 

 in mica slate, 

 passing into plumbago, 

 its origin, 



Anthracitous Mica Slate, 

 Arcade in Providence, its granite pillars, 

 Argentine, 



how produced in Williamsburgh, 

 Arenaceous Mica Slate, 

 Argillaceous Slute, its economical uses, 



of Worcester County, 

 of Franklin and Berkshire, 



its place among the rocks, - 286 



its mineralogical characters, 



dip and direction of its strata, 289 



its mineral contents, - 291 



associated with graywacke, - - 258 



its agricultural character, 

 disturbances among its strata, 

 its theory, - - - 294 



