502  INDEX    TO    PUBLICATIONS    OF    IT.    S.    GEOL.   SURVEY,     [bull.  177. 
Maryland;  fuller's  earth  in  Fredericksburg  quadrangle GF  13,  p  4 
fuller's  earth  in  Nomini  quadrangle GF  23,  p  4 
gabbros  and  associated  hornblende  rocks  occurring  in  the  neighborhood 
of  Baltimore Bull  28 
gas,  illuminating  and  fuel,  and  by-products  in,  statistics  of Ann  20, 
vi  cont,  pp  227,  240,  243,  246,  247,  248,  249 
geographic  positions  in Ann  19,  i,  p  158;  Ann  20,  i, 
pp  225-233;  Ann  21,  i,  pp  252,  253,  254;  Bull  123,  pp  72-74 
geologic  formations  of  Coastal  Plain  in Bull  138,  pp  124-126 
geologic  maps  of.      (See  Map,  geologic,  of  Maryland. ) 
geologic  sections  in.     (See  Section,  geologic,  in  Maryland.) 
geologic  and  paleontologic  investigations  in Ann  7, 
pp  67, 110, 123;  Ann  8,  i,  pp  167,  184,  185,  188;  Ann  9,  pp  115, 
122;  Ann  10,  pp  152-154;  Ann  11,  i,  pp  m,6S,  116;  Ann  12, 
i,  pp  72,  76, 117, 120,  122;  Ann  13,  i,  pp  107, 108, 112, 113, 145, 
147,148;  Ann  14,  i,  pp  217,  220,  240;  Ann  15,  pp  131-132, 
156;  Ann  16,  i,  p  17;  Annl7,  i,  pp  21-22,  29;  Ann  18,  i,pp30- 
31,  32;  Ann  19,  i,  pp  35,  36;  Ann20,  i,  pp39,  40;  Ann  21,  i,  p  74 
gold  in  Washington  ( D.  C. )  quadrangle GF  70,  p  7 
gold  and  silver  from,  statistics  of MR  1892,  p  88;  MR  1893,  pp  50,  51,  55; 
Ann  16,  m,  p  258;  Ann  17,  in,  pp  73,  74,  75;  Ann  18,  v,  pp 
141, 143, 144, 145, 149;  Ann  19,  vi,  pp  128, 129, 132, 133;  Ann 
20,  vi,  pp  103, 104, 105, 106,  108;  Ann  21,  vi,  pp  125,  126,  127 
gold  mining  in,  history  of Ann  20,  vi,  p  112 
granite  of  central,  origin  and  relations  of Ann  15,  pp  685-74C 
granite  production  of,  statistics  of MR  1888,  pp  536,  538;  MR  1889-90,  pp 
374,  398-399;  MR  1891,  pp  457,  459;  MR  1892,  pp  706,  707; 
MR  1893,  pp  544,  545;  Ann  16,  iv,  pp  437,  442,  457,  458,  459; 
Ann  17,  in  cont,  pp760,  761,  762,  763,  764-765;  Ann  18,  vcont, 
pp  950,  951,  952,  954,  956,  962-964;  Ann  19,  vi  cont,  pp  207, 
208,  209,  2>L0,  211,  220;  Ann  20,  vi  cont,  pp  271,  272,  273,  274, 
275,  276,  278;  Ann  21,  vi  cont,  pp  335,  336,  337,  338,  339,  340 
Harpers  Ferry  quadrangle,  geology  of GF  10 
iron,  iron  ores,  and  steel  from,  statistics  of Ann  2, 
p  xxviii;  MR  1882,  pp  120,  125,  129,  130,  131,  133,  134, 
135,  136,  137;  MR  1883-84,  p  252;  MR  1885,  pp  182,  184; 
MR  1886,  pp  18,  33,  77;  MR  1887,  p  11;  MR  1888,  pp  14,  23; 
MR  1889-90,  pp  10, 17;  MR  1891,  pp  12,  27,  54,  55,  61;  MR 
1892,  pp  12, 13, 15, 17,  21,  26,  35,  36,  37;  MR  1893,  pp  15,  20, 
26,  28,  35,  38,  39;  Ann  16,  in,  pp  31, 41, 192, 194,  203,  208,  249, 
250;  Ann  17,  in,  pp  26,  27,  39,  41,  47,  48,  57,  63,  68;  Ann  18, 
v,  pp  24,  41, 42;  Ann  19,  vi,  pp  26,  27,  29,  65,  68,  72;  Ann  20, 
vi,  pp  29, 43,  44,  74  et  seq;  Ann  21,  vi,  pp  34,  51,  52,  53, 90, 92 
iron  ore  in  Harpers  Ferry  quadrangle - GF  10,  p  4 
in  Piedmont  quadrangle GF  28,  p  5 
Kensington,  rating  station  for  meters  at Bull  140,  pp  331-332 
lime  production  of,  statistics  of MR  1887,  p  533;  MR  1888,  p  555 
limestone  in  Piedmont  quadrangle GF  28,  p  5 
production  of MR  1889-90,  pp  373,  399;  MR  1891,  pp  464,  466;  MR  1892, 
p  711;  MR  1893,  p  556;  Ann  16,  iv,  pp  437,494,495,507; 
Ann  17,  m  cont,  pp  760,  788,  789,  790,  793;  Ann  18,  v  cont, 
pp  950, 1044, 1045, 1046, 1058-1059;  Ann  19,  vi  cont,  pp  207, 
281,  282,  283,  297-298;  Ann  20,  vi  cont,  pp  271,  342,  343, 
344,  345,  348;  Ann  21  vi  cont,  pp  335,  357,  358,  359,  360 
