dead coral 6 



diabase , 2, 346 



— (recalculated) 7 



— from Massachusetts 7 



Venezuela 7 



disintegrated rock 7 



effusives from tlie Lower Keweenawan 10, li 



eleolite-syenite 3 



epidote 4 



feldspar 2 



gabbros from the Adirondacks . 6 



glauconite , 6 



gneiss 8 



granite from District of Columbia , 7 



New York 



Ontario 9 



granites from Rhode Island and Connecticut •. 10 



grahamite 10 



gypsum ... 8 



Hawaiian chalk , 6 



— coral rocks 6 



hornblende-syenite 3 



hypersthene 2 



leucite 8 



limestone 6 



magnesian limestone.. 3 



melilite 6 



microcline 7 



mineral-spring waters of Wisconsin and Minnesota 6 



nodular granite from Ontario 9 



peridotite 6 



Potsdam sandstone 3 



pyroxene 6, 254 



Reference to Clarke and Hille])rand's book of 9, 308 



rocks and soils 6, 323-326 



sandstones 

 schists 



serpentines 2 



shales 2, 410, 411 ; 9 



— and gabbros 2 



serpentines 2, 406, 408 



shonkinite 6, 414 



slates from Alabama 9 



Ontario 9, 225 



soil (residual) ... 8 



solids from sea- water 6, 191 



syenite 6 



283 

 240 

 192 

 193 

 249 

 345 

 180 

 258 

 348 

 470 

 104 

 194 

 169 

 478 

 349 

 410 

 309 

 328 

 412 

 413 

 414 

 308 

 404 

 409 

 418 

 308 

 226 

 159 

 192 

 418 



