394  INDEX    TO    PUBLICATIONS    OF    IT.    S.    GEOL.    SURVEY,      [bull.  177. 
Ilmenite,  analysis  of,  from  Illinois,  Macon  County Bull  74,  p  32 
analysis  of,  from  Kentucky,  Elliott  County  dike Bull  38, 
pp  24-25;  Bull  42,  p  136;  Bull  148,  p  92;  Bull  168,  p  56 
from  Massachusetts Bull  126,  p  107 
composition  of Ann  19,  in,  pp  385-386;  Bull  150,  p  34 
in  rocks  of  Pacific  slope Mon  xin,  p  84 
occurrence  of MR  1883-84,  p  772 
thin  section  of,  from  Nevada,  Washoe  district  (from  augite-andesite)..  .Mon  in, 
pp  150-151 
Ilmenite  and  titaniferous  magnetite,  chemical  composition  of,  considered  as 
minerals Ann  19,  in,  pp  385-386 
II vaite,  chemical  constitution  of Bull  125,  p  70 
occurrence  of MR  1883-84,  p  768 
Imidodiphosphate  (tri-  and  tetra-silver),  analyses  of Bull  167,  p  114 
Imidodiphosphoric  acid,  analysis  of Bull  167,  p  116 
salts  of Bull  167,  pp  113-116 
Impregnation,  deposition  of  ore  by Ann  18,  in,  pp  802-809 
Inclusion  in  any  substance.      (See  name  of  substance. ) 
Incrustation,  analysis  of,  from  Florida,  Everglades  (formed  by  evaporating 
waters) Bull  60,  p  163 
analysis  of,  from  Nevada,  old  Walker  Lake  and  near  Black  Rock... Bull  27,  p  70 
from  Pennsylvania,  Kiskiminitas  River  (from  casing  of  "gravel-bar 
gas  well") Bull  27,  p  71 
Independence  Lake,  California,  survey  of,  and  plans  and  estimates  for,  as  a 
reservoir  site.  .Ann  11,  u,  pp  174-175, 181;  Ann  13,  in,  pp  391-392 
Independence  shale  of  Iowa Ann  11,  i,  pp  320-323 
Index,  bibliographic,  of  North  American  Carboniferous  invertebrates Bull  153 
Index  and  bibliography  of  North  American  geology,  paleontology,  petrology, 
and  mineralogy for  1895,  Bull  146;  for  1896,  Bull  149; 
for  1897,  Bull  156;  for  1898,  Bull  162;  for  1899,  Bull  172 
I  ndex  and  catalogue  of  contributions  to  North  American  geology,  1732-1891.  .Bull  127 
of  publications  of  United  States  Geological  Survey  (1880-1893) ....Bull  100 
India,  Cambrian  rocks  of Bull  81,  p  378 
coal  area  and  output  of,  compared  writh  those  of  other  countries MR  1882, 
p  5;  MR  1885,  p  11;  MR  1886,  p  235;  MR  1887, 
p  189;  Ann  16,  in,  p  247;  Ann  17,  in,  p  320;  Ann 
18,  v,  pp  414,  420;  Ann  19,  vi,  pp  311,  319;  Ann 
20,  vi,  pp  332,  340;  Ann  21,  vi,  pp  113,  363,  372 
corundum,  occurrence,  etc. ,  of Ann  21,  vi  cont,  pp  441-447 
diamond  mines  of MR  1887,  p  569 
fossil  plants  of,  literature  of Ann  8,  n,  pp  793-796 
graphite  production  of,  statistics  of Ann  19,  vi  cont,  p  631 
gypsum  production  of,  statistics  of Ann  19, 
vi,  cont,  p  585;  Ann  20,  vi  cont,  p  666 
iron  and  iron  ore  from,  statistics  of.. Ann  16,  in,  p  23,  160-168;  Ann  21,  vi,  p  113 
iron-ore  deposits  of,  distribution,  method  of  working,  etc. .  .Ann  16,  in,  pp  160-168 
irrigation  in Ann  11,  n,  p  276;  Ann  12,  n,  pp  363-561 
manganese-ore  deposits  and  production  of,  statistics  of. . . Ann  17,  in,  pp  220-221; 
Ann  18,  v,  p  328;  Ann  19,  vi,  pp  124-125;  Ann 
20,  vi,  pp  154-155,  157;  Ann  21,  vi,  pp.  160,  162 
mica  production  of,  statistics  of Ann  19,  vi  cont,  p  622 
petroleum  localities  and  statistics  of MR  1893,  p  532;  Ann  17,  in  cont,  p 
720;  Ann  18,  v  cont,  pp  876-877;  Ann  19,  vi  cont,  pp  161-163; 
Ann  20,  vi  cont,  pp  196-202;  Ann  21,  vi  cont,  pp  282-288 
