warman]  SILURIAN SLAG.  733 
Silver  salts,  analyses  of Bull  167,  pp  145,  152 
indirect  estimation  of  chlorine,  bromine,  and  iodine  by  electrolysis  of 
their,  with  experiments  on  convertibility  of  silver  salts 
by  action  of  alkaline  haloids Bull  42,  pp  89-93 
Silver  City,  De  Lamar,  and  other  mining  districts  of  Idaho,  gold  and  silver 
veins  of Ann  20,  in,  pp  65-256 
Silver  (Miff  and  Rosita  districts,  Colorado,  mines  and  mining  in Ann  17, 
ri,  pp  405-472 
Silver  (  Miff  and  Rosita  Hills,  Colorado,  geology  of Ann  17,  n,  pp  263-403 
Silverheels  porphyrite  in  Colorado,  Leadville  district,  petrography  of Mon  xn, 
pp  342-343 
Silverheels  porphyry  in  Colorado,  Leadville  district Mon  xn,  pp  83-84 
Silveria  formation  and  other  sill  deposits Mon  xxxvm,  pp  111-118 
Similkameen  formation.     (Sec  Methow  formation.) 
Simmons  Bluff  beds  of  South  Carolina,  con-elation  of \nn  18,  n,  p  336 
Singkep,  Eastern  Archipelago,  tin  deposits  of. .Ann  Hi,  m,  p  192;  Ann  17,  in,  p  242 
Sinter,  analysis  of,  from  Australia,  Queensland Bull  90,  p  74;   Bull  L68,  p  251 
analysis  of,  from  ( lolorado,  <  reyser  mine Ann  17,  n,  pp  459-460 
from  Nc\  ada,  Steamboat  Springs : Ann  9,  p  670 
from  New  Zealand Ann  9,  pp  670,  675;   Bull  168,  p  251 
from  Yellowstone  Park Vnn  9,  p  670;   Bull  L68,  p  251 
of  Nevada,  Steamboal  Springs Mon  xiii,  p  341 
Sinter,  algous .Ann  9,  p  665 
Sinter,  dendritic Mon  \  in,  pn  266  268 
Sinter,  moss         Ann  9,  p  667 
Sinter,  siliceous,  deposition  of,  rate  of Ann  9,  p  666 
formation  of,  by  vegetation  of  ln>t  springs Ann  !),  p  613 
from  Yellowstone  Park,  description  of,  as  one  of  the  educational  series  of 
rocks Bull  150,  pp91  93 
nature  and  origin  of Ann  9,  pp  650,  655  657,  669-676 
of  New  Zealand .Ann  9,  pp  (172-676 
of  Yellowstone  Park Ann  9,  p  650;  GF  30,  pp  4,  5 
Sioux  quartzite  of  Lake  Superior  region Bull  86,  pp  18(5-187,  194 
of  South  Dakota WS  34,  p  12 
Sioux  Reservation,  lignites  of Bull  LM 
Siphon  elevators  in  irrigation W's  I ,  pp  51  -53 
Skolai  Pass,  Alaska,  trail  by  way  of Vnn  21,  n,  p  417 
Skolai  Range,  Alaska,  topography,  structure,  etc.,  of Vnn  21,  ti,  pp  393-440 
Skwentna  River,  Alaska,  reconnaissance  along Ann  20,  vn,  pp  48-49 
Skwentna  series  of  pre-Tertiary  rocks,  Alaska Ann  20,  vn,  pp  149-152,  235 
Slag,  analysis  of  (argentiferous  lead ) MR  1881 1-84 ,  pp  454-456 
analysis  of  (black  copper  shaft  furnace ) Bull  26,  p  99 
( blue  metal) Bull  26,  p  66 
from  Arizona Bull  26,  pp  78,  79;   MR  L883-84,  pp  405,  408 
from  Colorado Mon  xn,  pp  701 ,  704-705,  739;  Bull  26,  p  48 
Iron i  Germany Bull  26,  pp  48,  78 
from  India Ann  16,  in,  p  168 
from  Malay  Peninsula  (tin) .Ann  16,  in,  p  476 
from  Michigan,  Hancock Bull  26,  p  78 
from  Montana  ( reverberate ry  ore  furnace) .  .Bull  26,  p  48;  MR  1883-84,  p  388 
from  Nevada,  Eureka Mon  vn;  p  160 
from  New  York,  Laurel  Hill Bull  26,  p  78 
from  North  Carolina,  Ore  Knob Bull  26,  p  79 
from  Norway,  Kaafiord Bull  26,  pp  48,  59,  70 
