warman.]  ACTINOLITE ALABAMA.  119 
Africa,  fossil  plants  of,  literature  of Ann  8,  n,  pp  799-803 
gold  production  of,  compared  with  that  of  other  portions  of  the  world MR 
1883-84,  pp  319,  320 
iron-ore  deposits  in Ann  16,  in,  pp  177-180 
irrigation  by  artesian  waters  in  Algeria Ann'll,  n,  pp  265-266 
onyx  marble  localities  in Ann  20,  vi  cont,  p  290 
petroleum  in,  localities  and  statistics  of .  .Ann  19 
vi  cent,  pp  153,  166;  Ann  21,  vi  cont,  pp  290-291 
Witwatersrand  banket,  with  notes  on  other  gold-bearing  pudding  stones Ann 
18,  v,  pp  153-184 
Agassiz  Glacier,  Alaska,  description  of Ann  13,  n,  pp  35-38 
Agassiz  Lake,  the  glacial jyj; on  xxv 
beaches  and  deltas  of  upper Bull  39 
levels  of,  causes  of  changes  of Mon  xxv,  pp  487-501 
section,  geologic,  across  a  beach  ridge  of Bull  39,  %  1  (p  11) 
Agate,  occurrence  and  statistics  of MR  1882,  p  491;  MR  1883-84,  pp  756-760,  781; 
MR  1SS5,  p  44.'i;  MR  1886,  pp  597,  604;  MR  1887,  pp  556, 
557,  561 ;  MR  1888,  pp  584,  585;  MR  1889-90,  pp446,  447; 
MR  L891,  pp  540,  547;  MR  1892,  pp  774-776,  781;  MR  1893, 
pp  681,  682,  697;  Ann  17,  m  cont,  pp  914,  924;  Ann  18,  v 
cont.  pp  L207-1208,  1217;  Ann  19,  vi  cont,  pp  506,  513; 
Ann  I'D,  vi  c.»nt,  p  599;  Ann  21,  vi  cont,  pp  454-455,  461 
Agate  Bay  group  in  Minnesota Mon  v,  pp  284-294 
Agathaumas,  remarks  on Ann  16,  i,  p  217 
Agatized  wood  formations  in  Arizona MR  1891,  pp  548-549 
Agglomerate  of  Bassick  Hill  and  Mount  Tyndall,  Colorado Ann  17, 
ii,  pp  307-311,  343 
Agglomerates,  diabasic,  relations  of,  to  greenstone-schists  in  Marquette  district, 
M  ichigan Bull  62,  pp  185-191 
Aggrading  streams  in  ( !hattanooga  district Ann  19,  n,  pp  57-58 
Agnotozoic, name  for  system  of  rocks  between  Archean  and  Paleozoic Ann  7, 
pp  454-455;  Bull  86,  pp  147,  148,  461,  462,  475,  491,  493 
Agricolite,  chemical  constitution  of Bull  125,  pp  67, 101 
Agricultural  implements,  exports  of,  in  1899 Ann  21,  vi,  p  88 
Agricultural  products  of  Porto  Rico WS  32,  pp  34-41 
Agriculture;  farming,  dry,  in  Western   United  States,  areas  in  which  it  is  at- 
tempted   Ann  16,  ii,  pp  486-487 
in  Alaska,  possibilities  of Ann  20,  vn,  pp  24-27; 
Alaska  (2),  pp  24, 50,  72, 112;  Nome,  p  44 
on  Great  Plains,  necessity  of  irrigation  to Ann  21,  iv,  pp  680-691 
(See,  also,  Soils.) 
Air,  flow  of,  through  sands,  sandstones,  ana  other  porous  media,  experiments 
on Ann  19,  n,  pp  157-165, 168-178, 190-195, 199-202 
Ajibik  quartzite,  petrographic  character,  relations,  etc.,  of Ann  15,  pp  540-554, 
610-611;  Mon  xxvm,  pp  282-312,  528-529 
Akermannite,  chemical  constitution  of Bull  125,  p  27 
Alabama;  Alabama  River,  flow  of,  measurements  of WS  36,  pp  153-155 
Alabama,  Tuscaloosa,  and  Tombigbee  rivers,  Tertiary  and  Cretaceous  strata 
of Bull  43 
altitudes  in . .  Ann  18,  i,  pp 31 7-323;  Ann  19,  i,  p  253;  Ann  2ft,  i,  pp  387-405;  Ann  21, 
i,  pp  461-464;  Bull  5,  pp  25-28;  Bull  76;  Bull  160,  pp  23-31 
artesian  wells  in Ann  11,  n,  p  263 
atlas  sheets  covering  areas  in.      (See  p  67  of  this  bulletin. ) 
