154  INDEX    TO    PUBLICATIONS    OF    U.    S.    GEOL.   SURVEY,      [bull.  177. 
Assaying  of  silver  ore  with  micrometer  measuring  apparatus Ann  6,  pp  331-352 
Assays  of  Comstock  rocks,  Nevada ' Mon  in,  pp  154-155 
of  country  rock  of  Eureka,  Nevada Mon  vn,  pp  82-87, 120-138 
of  silver,  experimental Ann  6,  pp  339-341,  349-352 
of  tin  ore MR  1888,  pp  146-147 
Assays  and  assaying  at  Lead  ville,  Colorado Mon  xu, 
pp  608,  621-625,  632-636,  695,  etc 
Astartidre  from  clays  and  marls  of  New  Jersey Mon  ix, 
pp  23-24, 124-129,  209-214,  231-236;  Mon  x'xiv,  pp  52-59 
from  Cretaceous  of  Pacific  coast Bull  1 33,  pp  56-59 
Asteroidea,  Mesozoic,  of  United  States Bull  97,  pp  29-32 
Astian  formation  of  Italy,  correlation  of Ann  18,  n,  p  337 
Astoria  group  of  Oregon  and  Alaska Ann  17,  i,  pp  842-850; 
Ann  18,  n,  p  340;  Bull  84,  pp  223-226,  252-259;  321 
Astringent  clay  of  New  Jersey Bull  84,  p  321 
Astronomic  determinations  of  position  in  topographic  work Ann  18, 
i,  pp  143-144;  Ann  19,  i,  p  154;  Bull  70 
of  positions  in  topographic  work,  methods  of Mon  xxn,  pp  16-40 
Astrophyllite,  analysis  of,  from  Colorado,  El  Paso  County Bull  78, 
p  119;  Bull  90,  p  74 
chemical  constitution  of Bull  125,  pp  78,  105 
Atane  or  Atanekerdluk  beds  of  Greenland,  correlation  of Ann  18, 
ii,  p  346;  Bull  82,  p  203 
Atanum  Creek,  Washington,  seepage  measurements  on Ann  19,  iv,  pp  469-473 
Atcheson  (E.  G. ),  carborundum  in  1897 Ann  19,  vi  cont,  p  533 
Athens  shale  of  North  Carolina,  Tennessee,  and  Virginia GF  1-6, 
p  4;  GF  20,  p  3;  GF  25,  p  3;  GF  27,  p  2;  GF  59,  p  3 
Atlanta,  Georgia,  rainfall  at Ann  18,  iv,  p  70 
Atlantic  City  quadrangle,  New  Jersey,  physiography  of TF  1,  p  4 
Atlantic  Coastal  Plain  region,  artesian-well  prospects  in Bull  138 
Atlantic  slope,  Eocene  deposits  of Bull  141 
Atlantic  group  of  Atlantic  coast Bull  84,  p  321 
Atlantic  system  of  rocks  of  New  Hampshire Bull  86,  pp  351-355 
Atlantosauridre  of  North  America Ann  16,  i,  pp  166-17*5 
Atlantosaurus,  remains  of,  from  Denver  Basin Mon  xxvn,  pp  485-489 
remarks  on Ann  16,  i,  p  166 
Atlantosaurus  beds  in  western  United  States Ann  16, 
i,  pp  164-165;  Mon  xxvn,  p  476 
Atlas,  Geologic,  of  United  States,  plan  of Ann  15,  pp  79-90 
Atlas  folios,  geologic,  published,  list  of See  pp  64-66  of  this  bulletin 
Atlas  sheets,  topographic,  engraved,  list  of See  pp  67-109  of  this  bulletin 
(See,  also,  Map,  topographic. ) 
Atoka  formation  of  Indian  Territory Ann  21,  n,  pp  273-274 
Atolls,  or  annular  reefs,  description  of Ann  13,  n,  pp  133-134 
in  Philippine  Islands Ann  21,  in,  pp  561-562 
Atrato  River,  project  for  interoceanic  canal  by  way  of Ann  20,  iv,  pp  587-588 
Atremata,  biologic  development  of Bull  87,  pp  78-79 
Aturia  beds  of  Oregon,  correlation  of Ann  18,  n,  p  341 ;  Bull  84,  pp  224,  225,  321 
Aubrey  group,  age,  character,  thickness,  etc Ann  2, 
pp  114, 116, 151, 163,  217;  Ann  6,  pp  132-133 
Aucella,  remarks  on  the  genus,  with  especial  reference  to  its  occurrence  in 
California Mon  xm,  pp  201-204,  226-232 
Aucella-bearing  strata  of  California,  geologic  age  of Bull  15,  p  26 
Aucella  beds  of  Alaska,  remarks  on Ann  17,  i,  pp  867-869 
Auerbachite,  analysis  and  chemical  constitution  of Bull  125,  pp  75, 105 
