404  INDEX    TO    PUBLICATIONS    OF    U.    S.    GEOL.    SURVEY,     [bull.  177. 
Iowa;  gas,  illuminating  and  fuel,  and  by-products  in,  statistics  of Ann  20, 
vi  cont,  p  227  et  seq 
geographic  positions  in Ann  18,  i,  pp  159-161,  164;  Bull  123,  p  116 
geologic  maps  of,  listed Bull  7,  pp  89,  90,  91,  92 
(See  Map,  geologic,  of  Iowa. ) 
geologic  sections  in.     (See  Section,  geologic,  in  Iowa.) 
geologic  work  in,  summary  of Ann  14,  i,  pp  224-225 
geologic  and  paleontologic  investigations  in.  „ Ann  5,  p  20; 
Ann  6,  p  31;  Ann  7,  pp  80,  157;  Ann  8,  i,  p  143;  Ann  9, 
pp  106,  108-109;  Ann  10,  i,  pp  148-149;  Ann  11,  i,  p  104; 
Ann  14,  i,  pp  224-225;    Ann  15,  p  179;    Ann  18,  i,  p  55 
gold  and  silver  from,  statistics  of Ann  18,  v,  pp  141, 149;  Ann  19,  vi, 
pp  128,  129,  132,  133;  Ann  20,  vi,  pp  103,  104,  105,  106,  108 
gypsum  production  of,  statistics  of MR  1891,  pp  580, 
581;  MR  1892,  p  802;  MR  1893,  pp  714,  715;  Ann  16,  iv,  pp 
663,  664;  Ann  17,  in  cont,  pp  979,  980,  981;  Ann  18,  vcont, 
pp  1266, 1267;  Ann  19,  vi  cont,  pp  578,  579,  581,  582;  Ann 
20,  vi  cont,  pp  658,  661;  Ann  21,  vi  cont,  pp  524,  526,527 
Iowa  River,  profile  of WS  44,  p  79 
iron  and  steel  from,  statistics  of MR  1886,  p  18; 
MR  1887,  pp  11,  47-48;  MR  1888,  p  14;  MR  1892,  p  15; 
MR  1893,  p  15;  Ann  17,  m,  pp  48,63;  Ann  19,  vi,  p  66 
lime  production  of,  statistics  of MR  1887,  p  533;  MR  1888,  p  555 
limestone  production  of,  statistics  of MR  1891,  pp  464,  466;  MR  1892,  p  711; 
MR  1893,  p  556;  Ann  16,  iv,  pp  437,  494,  495,  499-503;  Ann 
17,  in  cont,  pp  760,  788  et  seq;  Ann  18,  v  cont,  pp  950,  1044 
et  seq;  Ann  19,  vi  cont,  pp  207,  281,  296  et  seq;  Ann  20, 
vi  cont,  pp  271,  342  et  seq;  Ann  21,  vi  cont,  pp  335,  357-360 
magnetic  declination  in Ann  17,  i,  pp  339-342 
maps,  geologic,  of.     (See  Map,  geologic,  of  Iowa. ) 
maps,  topographic,  of.      (See  Map,  topographic,  of  Iowa;  also  pp  74-75  of  this 
bulletin.) 
marble  production  of,  statistics  of Ann  17, 
in  cont,  pp  760,  766,  768-769;  Ann  18,  v  cont,  pp  950, 
975,977,  978,  980;  Ann  19,  vi  cont,  pp  239,  240;  Ann 
20,  vi  cont,  pp  282,  283;  Ann  21,  vi  cont,  pp342,  343 
mineral  springs  of,  statistics  of Bull  32, 
pp  161-163;  MR  1883-84,  p  982;  MR  1885,  p  537;  MR 
1886,  p  716;  MR  1887,  p  684;  MR  1888,  p  627;  MR  1889-90, 
p527;  MR  1891,  pp  603,  605;  MR  1892,  pp  824,  827;  MR 
1893,  pp  774,  777,  784,  788,  794;  Ann  16,  iv,  pp  709,  713,  720; 
Ann  17,  m  cont,  pp  1026,  1033,  1041 ;  Ann  18,  v  cont,  pp 
1371,  1378, 1386;  Ann  19,  vi  cont,  pp  661,  668,  677;  Ann  20, 
vi  cont,  pp  749,  757,  767;  Ann  21,  vi  cont,  pp  599,  608,  619 
mineral  spring  resorts  in Ann  14,  n,  p  83 
minerals  of,  useful MR  1882,  pp  681-682;  MR  1887,  pp  731-732 
Pleistocene  history  of  northeastern Ann  11,  i,  pp  189-577 
rainfall  in WS  29,  p  72 
average  annual  and  seasonal Ann  17,  n,  p  719 
rocks  in,  classification  of Bull  80,  pp  139-140, 146, 153, 166 
sandstone  production  of,  statistics  of MR  1891,  pp  461-462; 
MR  1892,  p  710;  MR  1893,  p  553;  Ann  16,  iv,  pp  437, 
484,  485,  487;  Ann  17,  m  cont,  pp  760,  775,  776,  777; 
Ann  18,  v  cont,  pp  950,1012,1013,1014,1023;  Ann  19, 
vi  cont,  pp  207,  264,  265,  266,  269;  Ann  20,  vi  cont,  pp 
271,  336,  337,  338,  339;  Ann  21,  vi  cont,  pp  335,  353-356 
