warman.]  IOWA IRON.  405 
Iowa,  sections,  geologic,  in.     (See  Section,  geologic,  in  Iowa. ) 
Skunk  River,  profile  of WS  44,  p  79 
topographic  maps  of.     (See  Map,  topographic,  of  Iowa;  also  pp  74-75  of  this 
bulletin. )  *| 
topographic  work  in Ann  9,  p  57; 
Ann  10,  i,  pp  93-94;  Ann  11, 1,  p  38;  Ann  12,  i,  p  29; 
Ann  18,  i,  pp  94,  95,  104-105;  Ann  19,  i,  pp  89,  90, 
102;  Ann  20,  I,  pp  100,  102,113,114;  Ann  21,  i,  p  131 
woodland  area  in Ann  19,  v,  p  9 
Iowa  and  Illinois  ice  lobes,  relation  of Mon  xxxviii,  pp  151-153 
Iowa  River,  profile  of WS  44,  p  79 
Iowan  drift  sheet  and  associated  deposits Mon  x  \  win,  \  >j  >  1  :!1-184 
Iowan  loess,  distribution,  structure,  deposition,  etc.,  of Mon  xxxviii,  pp  153-184 
Iowan  silt  in  Illinois-Indiana,  Danville  quadrangle GF  07,  pp  4-5 
Ireland,  Cambrian  rocks  of Bull  81,  p  377 
fossil  plants  of,  literature  of Ann  8,  n,  pp  687-689 
oolite  from,  comparison  of,  with  Kentucky  limestone MR  1880-90,  p  395 
(See,  also,  Great  Britain.) 
Iridacese  of  Alaska Ann  17,  i,  p  881 
of  North  America,  extinct Mon  xxxv,  p  33 
Iridium,  bibliography  of MR  L883  84,  pp  588-591 
Iridium  and  platinum,  statistics  of MR  1882,  pp  442-444;  M  R  1883-84,  pp  576- 
591;  MR  1885,  pp3H7-369;  MR  1886,  pp 222-223;  MR  1887, 
PP  142-143;  MR  1888,  pp  165-167;  MR  L889-90,  pp  143-144 
Iridosmine,  analysis  of,  from  various  countries  ( in  crude  platinum  ) .  .Ann  16,  in,  p633 
Iron,  alloys  of  chromium  and,  uses  of Aim  16,  in,  pp  610-614 
of  tungsten  and Ann  16,  i  1 1 ,  pp  6]  5-623 
analysis  of,  Abert  (meteoric) Bull  148,  p  246 
American  spiegel M  R  L883-84,  p  564 
from  a  Gruson  cast-iron  armor  plate Bull  55,  pp  87-88 
from  Alabama,  Woodstock  (spiegel) MR  1883-84,  p  565 
from  India,  Rajdoha  (crude) Ann  16,  in,  p  168 
from  New  York,  Palmer  (from  magnetite) MR  1887,  p  55 
from  North  Carolina,  various  localities Bull  74,  pp  15, 16, 17, 19 
from  Tennessee,  Jefferson  County Bull  42,  p  97 
in  California,  Jackson  quadrangle GF  11,  p  6 
in  Idaho,  Boise  quadrangle GF  45,  p  6 
in  Montana,  Fort  Benton  quadrangle GF  55,  p  6 
in  Philippine  Islands Ann  19,  vi  cont,  p  692;  Ann  21,  in,  pp  591-593 
method  of  working,  by  natives Ann  21,  in,  pp  592-593 
in  Porto  Rico Ann  20,  vi  cont,  pp  777-778,  786-787 
in  Tennessee,  Wart  burg  quadrangle GF  40,  p  4 
manufacture  of,  statistics  of MR  1882,  pp  108-171 ; 
MR  1883-84,  pp  246-311;  MR  1885,  pp  180-199;  MR 
1886,  pp  11-103;  MR  1887,  pp  10-57;  MR  1888,  pp  12-35; 
MR  1889-90,  pp  10-22;  MR  1891,  pp  47-73;  MR  1892, 
pp  12-22;  MR  1893,  pp  13-22;  Ann  16,  in,  pp  219-250; 
Ann  17,  in,  pp  45-71;  Ann  18,  v,  pp  51-140;  Ann  19,  vi, 
pp  65-89;  Ann  20,  vi,  pp  61-101;  Ann  21,  vi,  pp  69-118 
separation  of,  in  rock  analyses : Bull  78,  pp  87-90 
(See,  also,  Iron  ore;  Steel.) 
Iron,  chromic,  occurrence,  character,  uses,  etc.,  of Ann  17,  in,  pp  261-273 
Iron,  meteoric.     (See  Meteoric  iron.) 
Iron  and  steel,  protection  of,  against  rust,  Bower-Barff  process  of MR  1882, 
pp  164-171 
