140  INDEX    TO    PUBLICATIONS    OF    U.   S.   GEOL.   SURVEY,     [bull.  177. 
Anorthite,  chemical  constitution  of Bull  125,  pp  29-30,  33,  34, 102 
composition  of,  as  one  of  the  more  important  varieties  of  feldspar Ann  21, 
vi  cont,  p  594 
determination  of,  in  pyroxene-andesite Mon  xx,  p  353 
of  Keweenaw  series Ann  3,  pp  105-106;  Mon  v,  pp  59-61,  438-440 
thin  section  of,  from  Minnesota,  sec.  5,  T.  54,  R.  8  W Mon  v,  pp  56-57 
Anorthoclase,  analysis  of,  from  Massachusetts,  Marblehead  Neck Bull  148, 
p  78;  Bull  168,  p  34 
analysis  of,  from  Minnesota,  Pigeon  Point Bull  148,  p  107;  Bull  168,  p  77 
from  Montana,  Crazy  Mountains Bull  148,  p  145;  Bull  168,  p  123 
from  Pantelleria  Island  (from  rhyolite) Bull  109,  p  52 
in  lithophysse  of  Yellowstone  Park,  Obsidian  Cliff Ann  7,  pp  267-269 
thin  sections  of ,  in  quartz-porphyry  from  Pennsylvania,  South  Mountain... Bull 
136,  pp  96-97,  98-99 
Anorthosite,  analysis  of,  from  New  York,  Adirondack  region Ann  19, 
in,  p411;  Bull  168,  p  37 
association  of,  with  titaniferous  iron  ores  of  the  Adirondacks Ann  19\ 
in,  pp  397-399 
thin  section  of,  from  New  York,  Lake  Sanford Ann  19,  in,  pp  412-413 
Anthophyllite,  analysis  of,  from  North  Carolina,  Macon  County Bull  74,  p  45 
chemical  constitution  of Bull  125,  p  90 
Anthosiderite,  chemical  constitution  of Bull  125,  pp  66, 101 
Anthozoa  from  Eocene  of  middle  Atlantic  slope Bull  141,  pp  89-91 
Anthracite  basins  of  Pennsylvania,  structure  of Ann  13,  n,  pp  256-263 
Anthracite  coal.     (See  Coal.) 
Anthracite  and  Crested  Butte  quadrangles,  Colorado,  geology  of GF  9 
Anthracite  Range,  Colorado,  structure  and  rocks  of Ann  14,  n,  pp  186-188 
Anthribida?,  Tertiary,  of  United  States Mon  xxi,  pp  160-167 
Antietam  Creek,  Maryland,  flow  of,  measurements  of Ann  19, 
iv,   pp  149-150;  Ann  20,  iv,  pp  49,  122;  Ann  21,  iv, 
p  95;  WS  15,  p  16;  WS  27,  pp  19,  23,  24;  WS  35,  p  86 
Antietam  sandstone  in  the  Catoctin  belt  of  Maryland  and  Virginia Ann  14, 
ii,  pp  335-337 
in  Virginia-Maryland-West  Virginia,  Harpers  Ferry  quadrangle GF  10,  p  3 
Antigorite-serpentine  of  western  Massachusetts Mon  xxix,  pp  98-101 
Antimony,  occurrence,  uses,  and  statistics  of MR  1882,  pp  438-439;  MR  1883-84, 
pp  641-653;  MR  1885,  pp  387-388;  MR  1886,  pp  2,  7,  9; 
MR  1887,  pp  2,  6,  8-9;  MR  1888,  pp  10-11;  MR  1889-90, 
pp  141-142;  MR  1891,  pp  174-176;  MR  1892,  pp  260-262; 
MR  1893,  pp  184-186;  Ann  16,  in,  pp  624-627;  Ann  17, 
in,  pp  275-280;  Ann  18,  v,  pp  343-348;  Ann  19,  vi,  pp 
253-258;  Ann  20,  vi,  pp  283-289;  Ann  21,  vi,  pp  291-297 
Antimony  ore,  analysis  of,  from  California,  Kern  County MR  1882,  p  438 
new  method  of  reducing MR  1893,  pp  185-186 
Antlers  sands  of  Indian  Territory Ann  21,  vn,  pp  195-196 
of  Texas Ann  21,  vn,  pp  192-197 
Ants  as  agents  in  soil  formation Ann  12,  i,  pp  277-278 
Apalachicola  Basin,  stream  measurements  in Ann  18,  iv,  pp  84-93;  Ann  19,  iv, 
pp  233-240;  Ann  20,  iv,  pp  51,  182-184;  WS  11,  pp  23-24; 
WS15,pp45-47;  WS27,pp  49-51,  57,58;  WS  36,  pp  138-143 
streams  in,  list  of Ann  20,  iv,  pp  175-177 
Apalachicola  River,  profile  of WS  44,  p  30 
Apatite,  analysis  of,  from  Canada,  various  localities Bull  46,  p  42 
