648 



REPORT ON NATIONAL MUSEUM, 1886. 



Page. 



Virginia, diabase in 436 



granites in 426 



gypsum in 370 



marbles in 391 



sandstones in 461 



slates in 471 



soap-stouo in 360 



specimen of amphibolite from 606 



specimen of biotite schist from 606 



specimen of calcareons dolomite [mar- 

 ble] from 605 



spt-cimen of dolomite [marblej from 605 



specimen of muscovite granite from 606 



specimens of biotite granite from 606 



specimens of biotite gneiss from 606 



specimens of diabase from 606 



specimens of gy psnm from 605 



specimens of limestone [marble] from.. 605 

 specimens of magnesian limestone [mar- 

 ble] from 605 



specimens of sandstone from ^ 606 



specimens of slate from 606 



specimens of stalagmite marble from . . . 605 



specimens of steatite [soap-stone] from. 605 



Viridite, description of 299 



Vitreous, definition of 525 



Vitreons roclia 302 



Volcanic fragmental rocks 463 



W. 



W;i(ls\vortb, Dr., on induration of sand- 

 stone 339 



Wardwell channeling machine 312 



Wardwell, George J"., invented channclLng 



niach ine 321 



Waverly group of rocks in Ohio 456 



Page. 



Washington Territory, sandstones in 461 



specimens of sandstones from 607 



Weathering of building stones 331 



Weathering properties of stones 340 



Wedges in splitting stone, use of 314 



Wedge used in stone-working describe*!. . . 330 



West Indies, export of slate to 291 



West Virginia, sandstones in 4G2 



specimen of limestone [marble] from... 606 

 specimen of magnesian limestone [n.ar- 



ble] from .' 606 



specimens of sandstone from 606, 607 



White crystalline limestone, structure of. . . 304 



statuary marble, Italy 480 



or block marble, Italy 480 



Williamsite, Pennsylvania 308 



Winchell, Professor, on Trenton limestone 



in Minnesota 401 



on ■weathering of Trenton limestone 313 



Wisconsin, granites in 426 



limestones and dolomites in 406 



porphyry in 428 



sandstones in 461 



specimen of biotite gneiss from 608 



specimen of hornblende granite from . . . 608 



specimens of dolomite from 607, 008 



specimens of granite from 008 



specimens of quartzite from 009 



specimens of (juartz porphyjy from 608 



specimens of sandstone from 608, 009 



Wyoming, granites in 425 



specimen of hornblende granite from .. 609 



specimens of granite from 609 



T. 



Yellow marbles, Italy 481 



or Siena marble, Italy 4bl 



