380  INDEX    TO    PUBLICATIONS    OF    TT.    8.    GEOL.    SURVEY,     [bull.  177. 
Hydrolite,  occurrence  of MR  1891 ,  p  547;  MR  1893,  p  697 
Hydromica  from  New  Jersey,  analysis  and  constitution  of Bull  167,  pp  154-155 
Hydromica-schisl  of  Massachusetts,  western Mon  xxix,  pp  76-78,  156-163 
( >f  Northwestern  States Ann  5,  p  212 
Hydronephelite,  analysis  of,  from  Maine,  Litchfield Bull  42, 
pp  31-34;  Bull  148,  p  66;  Bull  168,  p  21 
chemical  constitution  of Bull  125,  pp  18,  33,  44;  101 
Hydrophlogopite,  chemical  constitution  of Bull  125,  p  49 
Hydroplasl  ic  rocks Bull  86,  p  440 
Hydrosol,  analysis  of  impure Bull  113,  pp  105, 106, 107, 108 
Eydrosol  of  silver,  preparation  of.. Bull  113,  pp  99-101 
Hydrothermal  alteration  of  granite,  basalt,  and  rhyolite  of  Idaho Ann  20, 
in,  pp  174-186 
1 1  y<  I  r<  >zoa  of  Cambrian,  lower Ann  10,  i,  pp  587,  604-606 
of  Cambrian,  middle,  of  North  America Bull  30,  pp  51,  91-94 
of  Olenellus  zone Ann  1 0,  i,  pp  604-606 
Hyperite,  analysis  of,  from  Sweden Bull  28,  p  37 
Hypersthene,  analysis  of,  from  Colorado,  Buffalo  Peaks Mon  xn,  p  589; 
Bull  1,  p  29;  Bull  148,  p  171;  Bull  150,  p  226;  Bull  168,  p  153 
analysis  of,  from  Greece,  Santorin Bull  1 ,  p  29 
from  Labrador,  St.  Pauls  Island Bull  1 ,  p  29 
from  Maryland,  Baltimore . .  .Bull  28,  pp  23,  44;  Bull  150,  p  281 
Gwynns  Falls .Bull  28,  pp  21,  44 
from  Minnesota,  sec.  20,  T.  65  N.,  R.  4  W...Bull  148,  p  111;  Bull  168,  p  81 
from  Oregon,  Mount  Thielsen Bull  9,  p  15 
from  Pacific  coast Ann  17,  i,  p  735 
chemical  constitution  of Bull  125  p  86 
from  Nevada,  Eureka  district,  partly  altered Mon  xx,  pp  396-397 
in  basalt Mon  xm,  p  157 
in  dacite Mon  xx,  p  369 
in  diorite  from  Wyoming,  Electric  Peak Ann  12,  i,  pp  603-604 
in  pyroxene-andesite Mon  xx,  p  356 
in  rhvolitic  pumice Mon  xx,  p  381 
methods  of  isolation  of Bull  1,  p  27 
thin  section  of,  from  Delaware,  showing  alteration   into  tremolite  and 
fibrous  green  hornblende Bull  59,  p  23 
from  Nevada,  Eureka  district,  from  andesite  perlite Mon  xx,  pp  396-397 
Hypersthene-andesite,  analysis  of,  from  Arizona,  San  Francisco  Mountains.. Bull  42, 
p  139;  Bull  148,  p  188;  Bull  168,  p  174 
analysis  of,  from  California,  Bid  well  Bar  quadrangle Ann  17, 
i,  pp  569,  731;  Bull  148,  p  202;  Bull  168,  p  188 
from  California,  Downieville  quadrangle Ann  17, 
i,  p  731;  Bull  148,  p  207;  Bull  168,  p  193 
Lassen  Peak  region Ann  17,  i,  p  731 ;  Bull  148, 
pp  196,  197;  Bull  165.  p  171;  Bull  168,  pp  182,  186 
Mount  Shasta Bull  148,  p  190;  Bull  150,  p  228;  Bull  168,  p  173 
from  Colorado,  Buffalo  Peaks Mon  xn,  p  589;  Bull  1,  p  26; 
Bull  148,  p  171;  Bull  150,  p  227;  Bull  168,  p  153 
from  Montana,  near  Red  Bluff .  .Bull  90,  p  70;  Bull  148,  p  140;  Bull  168,  p  114 
from  Washington,  Mount  Rainier Ann  18,  u,  p  420 
from  California,  Mount  Shasta,  description  of,  as  one  of  the  educational 
series , Bull  150,  pp  227-228 
from  Colorado,  Buffalo  Peak,  description  of,  as  one  of  the  educational  series.  .Bull 
150,  pp  224-227 
