288  INDEX    TO    PUBLICATIONS    OF    U.    S.    GEOL.   SURVEY,      [bull.  177. 
Diabase  amygdaloid,  thin  section  of,  from  Massachusetts,  South  Holyoke,  show- 
ing contact  of  clayey  limestone  and Mon  xxix,  pp  208-209 
Diabase  flows  and  dikes  in  Catoctin  Mountains Ann  14,  n,  pp  315-318,  352-355 
Diabase  dike,  thin  section  of,  showing  contact  norite  wall  and,  Trembleau 
Point,  New  York Bull  107,  p  46 
Diabase-porphyrite,  analysis  of,  from  California,  Yuba  County Bull  148, 
p  228;  Bull  168,  p  217 
analysis  of,  from  Montana,  Crazy  Mountains Bull  148,  p  143;  Bull  168,  p  121 
of  California,  Colfax  quadrangle GF  66,  p  4 
Trackee  quadrangle GF  39,  p  4 
of  Michigan,  Keweenaw  series Ann  3,  pp  108-110;  Mon  v,  pp  77-87 
thin  section  of,  from  Michipicoten  Island,  Ontario Ann  3, 
pp  108-109;  Mon  v,  pp  76-77 
from  Minnesota,  Duluth Ann  3,  pp  108-109;  Mon  v,  pp  76-77 
Diabase-porphyry,  analysis  of,  from  California,  Downieville  quadrangle Ann  17, 
i,  p  734;  Bull  148,  p  207;  Bull  168,  p  192 
of  Sierra  Nevada Ann  17,  i,  pp  644-646 
Diabase-pseudamygdaloid,  thin  section  of,  from  Michigan,  Porcupine  Moun- 
tains   Mon  v,  pp  60-61 
thin  section  of,  from  Wisconsin,  Douglas  County Mon  v,  pp  60-61 
from  Wisconsin,  Gogogashugun  River Mon  v,  pp  60-61 
Diabase-tuff,  analysis  of,  from  Calfornia,  Butte  County Bull  148,  p  205 
analysis  of,  from  Philippine  Islands Ann  21,  in,  p  500 
Diabase-tuffs  of  Michigan,  and  their  metamorphism  to  greenstones Bull  62, 
pp  133, 158-162 
Diabasic  amygdaloid  of  Keweenaw  series Mon  v,  pp  87-91 
Diabasic  rocks  from  Alaska,  descriptions  of  species  of Ann  20,  vn,  pp  211-216 
Diadematidse,  Mesozoic,  of  United  States Bull  97,  pp  44-54 
Diagrams,  conventional  characters  for Ann  2,  pp  liii,  liv;  Ann  10,  i,  pp  77-78 
Diallage,  analysis  of,  from  Maryland,  Gwynns  Falls. Bull  28,  pp21,  44;  Bull  150,  p 280 
analysis  of,  from  Minnesota,  Pigeon  Point Bull  109, 
p  36;  Bull  148,  p  106;  Bull  150,  p  277;  Bull  168,  p  76 
from  Scotland,  Balta  Islands Ann  17,  i,  p  735 
from  Wisconsin,  Ashland  County Bull  60, 
p  149;  Bull  148,  p  105;  Bull  168,  p  75 
of  Minnesota,  southwestern,  in  gabbro-schists Bull  157,  pp  80-81 
thin  section  of,  from  Delaware,  illustrating  alteration  into  compact  green 
hornblende Bull  59,  p  26 
from   Michigan,    Sturgeon   Falls    (in   gabbro),  showing   hornblende 
around Bull  62,  p  70 
Diallage-bronzite  rock,  analysis  of,  from  Maryland,  Baltimore  County.. Bull  64,  p  43 
Diallage-gabbro,  analysis  of,  from  Minnesota,  sec.  26,  T.  64  N.,  R.  8  W Bull  148, 
p  111;  Bull  168,  p81 
Diallage  serpentine,  analysis  of,  from  Russia,  Ural Bull  1 13,  p  27 
Diamond-core  drill,  cost,  method  of  operating,  etc WS  33,  pp  43-48 
Diamond  Peak  quartzite  of  Nevada,  age,  character,  thickness,  etc.,  of Ann  3, 
pp  253,  268;  Mon  xx,  p  85 
Diamonds,  occurrence  and  statistics  of : MR  1882,  pp  484- 
485;  MR  1883-84,  pp  728-733,  781;  MR  1885,  pp  438,  443; 
MR  1886,  pp  598-601,  604;  MR  1887,  pp  556,  557,  558-559, 
563-571;  MR  1888,  pp  580,  584-585;  MR  1889-90,  pp  446, 
447;  MR  1891,  pp  539,  540-542;  MR  1892,  pp  756-760,  781; 
MR  1893,  pp  681,  682-692;  Ann  16,  iv,  pp  595-599,  604, 
605;  Ann  17,  in  cont,  pp  896-904,  923;  Ann  18,  v  cont,  pp 
1183-1196,  1217;  Ann  19.  vi  cont,  pp  497-503,  513;  Ann  20, 
vi  cont,  pp  557-568,  599;  Ann  21,  vi  cont,  pp  419-432,  461 
(See,  also,  Precious  stones.) 
