warman.]  INVERTEBRATES IOWA.  403 
Iodine,  analysis  of  mother  liquor  of,  from  South  America,  Tarapaca.  .MR  1883-84,  p  858 
statistics  of MR  1883-84,  pp  854-858;  MR  1885,  pp  488-490 
Iodine,  bromine,  and  chlorine,  indirect  estimation  of,  by  electrolysis  of  their 
silver  salts,  with  experiments  on  convertibility  of  silver 
salts  by  action  of  alkaline  haloids Bull  42,  pp  89-93 
proportional  amounts  of,  in  chloride  ores  from  Colorado,  Leadville  dis- 
trict   - Mon  xn,  p  548 
Iolite,  chemical  constitution  of Bull  125,  pp  83, 105 
occurrence  of MR  1882,  p  488;  MR  1883-84,  p  743 
lone  formation  of  California,  correlation  of Ann  18,  n,  p  338 
description  and  localities  of Ann  14,  n,  pp  415-419, 
462-465;  Ann  17,  i,  pp  546-547;  GF  3,  p  1;  GF  5,  pp  1,  3;  GF 
11,  ppl,4;  GF15,  pi;  GF  18,  p  4;  GF  37,  pi;  GF41,p6 
Iowa,  altitudes  in Ann  18,  i,  pp  326-333;  Ann  19,  i, 
pp  257-259,270-273;  Ann  20,  i,  pp  407,  419;  Ann  21,  i,  pp 
472-473;  Bull  5,  pp  105-112;  Bull  72,  pp  195,  201,  214-217; 
Bull  76;  Bull   L58,  pp  91-92,  154-167;  Bull  160,  pp  197-221 
artesian  wells  at  Dubuque Ann  11,  n,  p  262 
atlas  sheets  of.     (See  pp  74-75  of  this  bulletin.) 
boundary  lines  of,  and  formation  of  State Bull  13, 
pp  31, 117-118;  Bull  171,  pp  123-124 
brick  industry  of MR  1887,  pp  535,  538;  MR  1888,  pp  559-560 
building  stone  from,  at  World's  Columbian  Exposition MR  1893,  p  562 
statistics  of MR  1882, 
p  451;  MR  1887,  p  516;  MR  1888,  pp  540,  544;  MR  1889-90, 
pp  373,  393-394;  MR  1891,  pp  461,  462,  464,  466;  MR  1892, 
pp  710,  711;  MR  1893,  pp  553,  556;  Ann  16,  iv,  pp  437,  438, 
484  et  seq;  Ann  17,  in  cont,  p  760  et  seq;  Ann  18,  v  cont,  pp 
950,  975  et  seq,  1012,  1013,  1014,  1023,  1044,  1045, 1046, 1058; 
Ann  19,  vi  cont,  pp  207,  239,  240,  264  et  seq;  Ann  20,  vi  cont, 
pp  271,  282,  283,  336  et  seq;  Ann  21,  vi  cont,  p  335  et  seq 
•  lav  deposits,  industry,  and  products  of,  statistics  of MR  1891, 
p  514;  MR  1892,  p  735;  Ann  16,  iv,  pp  518,  519,  520,521; 
Ann  17,  in  cont,  pp  819  et  seq,  860;  Ann  18,  v  cont,  p  1078 
et  seq;  Ann  19,  vi  cont,  pp  318  et  seq,  358,  473-476;  Ann 
20,  vi  cont,  pp  466  et  seq,  520;  Ann  21,  vi  cont,  pp  362,  363 
coal  area  and  statistics  of Ann  2,  p  xxvin; 
MR  1882,  pp  55-56;  MR  1883-84,  pp  12,  45,  46;  MR  1885, 
pp  11,  30;  MR  1886,  pp  225,  230,  266-268;  MR  1887,  pp  169, 
171,  245-253;  MR  1888,  pp  169,  171,  262-269;  MR  1889-90, 
pp  147,  215-217;  MR  1891,  pp  180,  233-243;  MR  1892,  pp 
265,  267,  268,  390^04;  MR  1893,  pp  189,  190,  194,  195, 
197,  199,  200,  285-294;  Ann  16,  iv,  pp  112-121;  Ann  17, 
in,  pp  287  et  seq,  421-429,  542;  Ann  18,  v,  pp  354  et  seq, 
515-524;  Ann  19,  vi,  pp  278  et  seq,  419-429;  Ann  20,  vi,  pp 
300  et  seq,  417-420;    Ann  21,  vi,  pp  325  et  seq,  446-449 
coke  in,  manufacture  of Ann  20,  vi  cont,  p  227 
Davenport,  wells  at,  records  of Ann  17,  n,  pp  842-845 
Des  Moines  River,  profile  of WS  44,  p  78 
driftless  area  of  Upper  Mississippi  Valley Ann  6,  pp  199-322 
elevations  in Ann  18,  i,  pp  326-333;  Ann  19, 
i,  pp  257-259,  270-273;  Ann  20,  i,  pp  407, 419;  Ann  21,  i,  pp 
472-473;  Bull  5,  pp  105-112;  Bull  72,  pp  195,  201,  214-217; 
Bull  76;  Bull  158,  pp  91-92, 154-167;  Bull  160,  pp  197-221 
formations,  geologic,  of  northeastern Ann  11,  i,  p  234 
