680 General Index. 



Argillo-micaceous Slate, 

 Argillaceous Oxide of Iron, 

 Arsenical Pyrites, 

 Asbestus, - . 



Asterophyllites in graywacke, 

 Augite Rock, 



white crystallized in Limestone, 



actynolite, &c. 

 Autumnal Scenery, 



B. 



Baldwin, C. C. letter from - 204 



Beach Grass used for fixing sands, * - - 7 



Beaumont Elie de on graphite and anthracite, - - 281 



on the elevation of mountain?, - 522, 539 



Beartown Mountain, 77 



Belchertown Granite, - - * 18 



Bennington iron mine, - - - - 56 



Bernardston iron mine, - - - - 54 



Beryl, - - . - - - 50,506 



Birds in Massachusetts, Catalogue of - - 545 



Bitter Spar, ..... 362 



Bituminous Limestone and Marlite, - - - 214 

 Blende, .... 230, 348, 462, 507 



Blue Hills, ..... 84 



Bog Ore, its localities, - - - - 57 



pelrefactions in - - 123 

 theory of its origin, .... 122 



Boston Harbor, its scenery, - - - - 92 

 hypothesis of formation, ... 125 



Bowdoin Street Church, its granite, - - - 17 



Bowlders, - . . - . 146 



Boltonite, or Bisilicate of Magnesia, - - 310 



Brown Spar, ..... 502 



Buhrstone i n Washington, 41, 317 



its origin, .... 325 



Calamites in new red sandstone, ... 233 



in graywacke, .... 285 



Calcareous Spar, ... - 52, 436 



Cape Ann Sienite, - - - - - 15 



scenery of 95 

 Cape Cod, scenery of - - - 96 



clay cliffs upon - - - - 127 



Carbonate of Magnesia and Iron. - - - 363 



of Copper, 226, 364 



Carnelion and Cacholong, .... 435 



Caverns and Fissures, - - - < 104 



in Berkshire, - 105 



Cascade in Leverett, - - . - • 103 



and Natural Bridge in Adams, - - , 103 



Central heat, theory of - - - - 516 



Chabasie, - 436, 461 



Chalcedony, ... 50, 323, 371, 399, 435 



Chatham Beach its gain upon the sea, - - - 128 



Chelmsford Granite, - - - - 16 



Chart, " - . . . . 265 



Chiastolite, - - . - .291 



Chlorite, ..... 434 



Slate, - - 353 



its agricultural character, - - J-l 



Chlorophoeite, .... 435 



328 

 57, 188 

 348 

 433 

 284 

 330 

 - 304 

 310, 398, 435 

 107 



i 



