494 
INDEX    TO    NORTH    AMERICAN    GEOLOGY 
Economic  products  described — Continued. 
Silver,  Ordonez.  3,  11. 
Silver.  Pratt,  8,  10.  11. 
Silver.  Purington,  1,  3,  5. 
Silver.  Ransome,  1-3,  6,  13,  16-18. 
Silver.  Spencer  (A.  C),  10. 
Silver,  Spurr,  0.  11.  is.  27,  29. 
Silver.  Spurr  and  Garrey,  1. 
Silver.  Stretch.  3. 
Silver.  Udden  (Johan  A.),  1. 
Silver,  Vicaire,  1. 
Silver.  Villafana,  1. 
Silver.  Villarello,  9. 
Silver,  Weatherby,  1. 
Silver.  Weed.  5. 
Silver,  Vung  and  Mc<  !affery,  1. 
Skutterudite,  Merrill  (G.  P.),  •"-• 
Slate.  Dale,  2,  4,  8. 
Slate.  Eckel,  24,  J7.  28. 
Slate.  Hayes   (C.  W.i.  5. 
Slate.  Hitchcock  (C.  II. ».  10. 
Slate.  New  land.  2. 
Slat.'.  Perkins,  1.  2,  6. 
Slate,  Richardson  (C.  II.  i.  2. 
Smaltite,  Merrill  (G.  P.),  ::. 
Soapstone,  I  >ay,  6   11. 
Soapstone,  Keith.  1.  9,  12. 
Soapstone,  I'rat  r.  11. 
Soda.  Dart  on.   is. 
Soda  niter,  Merrill  (G.  P. ».  ::. 
Soils.  Dart. -n.  7.  8,  26. 
Soils.  I  larton  and  <  >'I  Iarra.  1 . 
Soils.  Dartoii  and  Smith.  1. 
Soils.  Fairbanks,  7. 
Soils.  Fuller  and  <  llapp,  2. 
Soils.  Hall    (C.  W.i.  L>. 
Soils.  Hayes  (C.  W.),  5. 
Soils.  Hayes  and  Ulrich,  1. 
Soils.  Lakes,  tO. 
Soils.  Norton,  1 . 
Soils.  Russell,  23. 
Soils.  Smith  and  McCalley,  1. 
Soils.  'la IT.  0. 
Soils.  Todd  (.1.  E.),   10,  11. 
Soils.  Weidman,  ::. 
Spodumene,  I »  I  Iarra.  2. 
Spodumene    and    petalite,    Merrill     (G. 
P.),  3. 
Steatite,    tale,    and    soapstone.    Merrill 
(G.  P.),  3. 
Steel-hardening  metals.  Day.  11. 
Stone.  I  ay.  t;    n. 
Stone.  Newland,  -. 
Strontianite.  Ells  lit.  W.i.  7. 
Strontianite,  Merrill   (G.  P.),  3. 
Strontium,  Aguilera.  ."». 
Strontium,  Day.  8. 
Succinite:  amber,  Merrill   (G.  P.),  3. 
Sulphur,  Adams  (G.  I.),  16. 
Sulphur,  Aguilera,  3. 
Sulphur,  Caracristi.  1. 
Sulphur.  Day.  6-lx. 
Sulphur.  Kerr.  1. 
Sulphur.  Merrill   (G,  P.),  12. 
Sulphur,  Phillips   i  W.  15.  i.  5. 
Sulphur,  Richardson    ((I.  B.),  4,(  8. 
Sychnodymite.  Merrill  (G.  P.),  3. 
Economic  products  described — Continued. 
Talc,  Blasdale,  1. 
Talc,  Day.  7-11. 
Tale.  Keith,  7,  9,  12. 
Tale.  Merrill  <<;.  P.).  12. 
Talc.  Miller  (  W.  (i.),  6. 
Talc,  Newland,  l'. 
Talc,  Peck.  0. 
Talc.   Pratt.  7.  S.  10.  11. 
Tantalum.  Pratt.  11. 
Tar.  Day.  0-11. 
Tellurium.  Aguilera,  .'!. 
Thenardite,   Merrill   (G.  P.),  3. 
Tin.  Aguilera,  ::. 
Tin,  Bell    (R.   N. ) .  2. 
Tin,  Bell  (Robert),  4. 
Tin.  Brooks,  1.  2,  8. 
Tin.  Collier,  1.  5,  7.  11. 
Tin.   Dart  on.   IS.   26. 
Tin,  Day,  7.  11. 
Tin.  Fawns,  1. 
Tin.  <  Jarrison.  .",. 
Tin.  Graton,  ::. 
Tin.  I  less  and  Craton.  1. 
Tin.  [rving,  ::. 
Tin,  [rving  and  Emmons,  1.. 
Tin.  Nevius,  •">. 
Pin.  O'Harra,  2. 
Tin.    Pratt.   10.   11. 
Tin.   Pratt    and   Sterrett.  1. 
Tin,  Rickard  (E.),  1. 
Tin.  Strut  hers  and  Pratt.  1. 
Tin,  Weed.  4,  1.1. 
Titanium,  Day.  8. 
Topaz,  Aguilera,  '■>. 
Tourmaline.  Kiinz.  2. 
Trap.   Newland.   2. 
Triphylite  and  lithiophilite,  Merrill  (G. 
p.i.  :;. 
Tripoli.   Merrill    (  Gk   P.).  3,  12. 
Tripolite,  Crosby,  1. 
Trona  :  urao,  Merrill    id.  P. ) ,  3. 
Tschermigite,  Merrill  <<;.  P.  i,  3. 
Tufa.  Shedd.  2. 
•I'.ifT.  Shedd.  2. 
Tungsten,  Day,  5,  7-9. 
Tungsten,  Hobbs,  16. 
Tungsten,   [rving  and  IOmmons.  1. 
Tungsten,  Johnston.  1. 
Tungsten,   .Merrill    (<i.    P.),  12. 
Tungsten,  I  >"I  iarra,  2. 
Tungsten,  Rickard   (F.),  3. 
Tungsten,  Simmons.  1. 
Tungsten,  Smith   (F.  1).),  1. 
Tungsten,  Weeks,  1,  8. 
Turquoise,  Johnson  (D.  W. ).  4. 
Ulexite ;    boronatrocalcite,    Merrill    ((J. 
P.),  3. 
Uintaite,  Eldridge,  1. 
Dintaite;  gilsonite,  Merrill  (G.  r.),  3. 
Uraninite ;  pitchblende,  Merrill  (G.  P.), 
3. 
Uranium,  Boutwell,  0. 
Uranium,  Day.  7-9. 
Uranium,  Pratt.  11. 
Vanadinile.   Merrill    (d.  P.),  3. 
Vanadium,  Aguilera,  3. 
