G46 



REPOET ON NATIONAL MUSP^UM, 1886. 



Page. 



Segregated, definition of 525 



Selection of building stono 345 



Serpentine, California 362 



cbaracters of 298 



composition of 361 



Connecticat 363 



definition of 525 



Delaware 364 



Maine 364 



Maryland 364 



Massachusetts 365 



New Jersey 366 



New York 366 



North Carolina 367 



origin of 361 



Pennsylvania 367 



specific gravity of 365 



uses of 361 



Vermont 368 



of the various States and Territories .. 362 



Serpentinous rocks, England 473 



Italy 474 



Shaler Sc Hall, sandstone quarrj' of 290 



Shaler, Professor 285 



on clay slats for rough building 467 



Sheldon &, Slason, quarries of 317 



Shell limestone, definition of 525 



characters of 373 



Shell sand-rocks, character of 373 



Shurtleff, quoted 285 



Siliceous, definition of 525 



rocks 307 



sandstones 415 



Slate belts in Vermont 471 



Slate, colors of 465 



composition and structure of 464 



for roofing purposes 291 



for tombstones, use of 291 



quarries in United States, amount in- 

 vested in 291 



quarrying and splitting of .- 318 



quarrying in United States, early 291 



sawing 319 



statistics of shipment from Slatingtou 



region in 1882 470 



table of sizes for roofing 465 



uses of 465 



Slates, Canada 488 



foreign 488 



Georgia 466 



Maine 466 



Maryland 466 



Massachusetts 466 



Michigan 467 



Minnesota 467 



New Ilampshire 468 



New Jersey 468 



New York 468 



Pennsylvania 469 



idaces of occurrence of 466 



South Carolina 470 



Texas 470 



Voriuoiit 470 



Virginia 471 



Sledge-hammers used in stone- working 330 



Page. 



Smith, Dr., tests of air quoted 336 



Soapstone, Arkansas 358 



composition and uses of . . . .' 357 



District of Columbia 358 



Massachusetts . 358 



New Hampshire 358 



New York 358 



North Carolina 358 



Pennsylvania 359 



of the various States and Territories .. 338 



South Carolina 359 



Texas 359 



Vermon t 359 



Virginia 360 



Soft soap and alum solution for jirotecting 



stone 355 



Solvent action of acids atfecting weather- 



ingof building stones 338 



South America, export of slate to 291 



specimens of building stone from 616 



South Carolina, granite in 425 



slates in , 470 



soap-stone in 359 



specimen of limestone from 592 



specimens of biotite granite from 592 



specimenof steatite (?) [soap-stone] from 592 



Spain and Portugal, building stones of 483 



Spain, specimen of calcareous tufa from . . . 629 



specimen of dolomite from 629 



specimen of sandstone from 629 



specimen of slate from 629 



specimens of calcareous breccia fmnr- 



blol from 628 



specimens of calcareous sandstone from . 629 



specimens of gypsum from 629 



specimens of limestone from. 028,629 



specimens of limestone f marble] from . . 628 



specimens of shell limestone from 629 



Spalls, definition of 525 



Specific gravity of granite 408 



of limestones 491 



of sandstone 492 



of serpentine 365 



of stones . 334 



of stones, table of 494 



Specular iron ore, characters of 201 



Spider-web, definition of 525 



Split rock, definition of 525 



Splitting-chisel used in stone- working 330 



Square drove finish 320 



Stalactite, description of 372 



Stalactitic marble, definition of 525 



Stalagmite, characters of 372 



Steatite, characters of 29S 



Stock, definition of 525 



Stone structures in the United States, list 



of the more important 515 



Stone-working, machines used in 320 



Stones of foreign countries 473 



Strata, definition of 525 



Stratified, definition of 525 



granites (gneiss) 441 



Streaked, definition of 525 



Strength of building stone 490 



Strike, definition of 625 



