warman.]  HYDROLITE— IDAHO.  381 
Hypersthene-andesite  in  augitic  rocks Bull  1,  pp  19-38 
of  Colorado,  Buffalo  Peaks Mon  xn,  p  354 
of  Washington,  Mount  Rainier Ann  18,  n,  pp  416-422 
thin  section  of,  from  California,  Mount  Shasta Bull  150, pp   228-229 
Hypersthene-augite-andesite,  analysis  of,  from  Oregon,  Crater  Lake Bull  168,  p  222 
Hypersthene-basalt,  analysis  of,  from  Oregon,  Mount  Thielsen Bull  148, 
p230;  Bull  168,  p  220 
analysis  of,  from  Virginia,  Culpeper  County Ann  21,  in,  p  81 
Hypersthene-bearing  gabbro-schists  in  southwestern  Minnesota Bull  157,  pp  82-98 
Hypersthene-gabbro,  analysis  of,  from  Maryland,  Gwynns  Falls Ann  15, 
p673;  Bull  28,  p  37 
analysis  of,  from  Maryland,  Mount  Hope  Cut Bull  28,  p  37 
from  Maryland,  Wetheredville Ann  15, 
p  673;  Bull  148,  p  85;  Bull  150,  p  372;  Bull  168,  p  44 
from  Minnesota,  Granite  Falls  (porphyritic  hornblendic) Bull  157,  p  89 
sec.  20,  T.  65  N.,  R.  4  W  (granulitic) Bull  90, 
p  68;  Bull  148,  p  111;  Bull  168,  p  81 
of  Delaware Bull  59,  pp  10-15 
of  Maryland,  near  Baltimore Bull  28,  pp  18-26,  32-49 
of  Minnesota,  near  Odessa Bull  157,  pp  136-137 
thin  section  of,  from  transitional  zone  between  gabbro-diorite  and,  from 
Maryland,  Mount  Hope Bull  28,  pp  670-671 
from  Minnesota,  Minnesota  Falls Bull  157,  pp  144-145 
Hypozoic  rocks Bull  86,  pp  357,  404 
(See  Archean. ) 
I  fypsilophodon,  remarks  on  and  restoration  of Ann  16,  i,  p  230 
Hypsometry,  barometric,  new  method  of .Ann  2,  pp  xxxviii-xl,  403-566 
Ice,  floating,  transportation  by Mon  xxxiv,  p  21 
Ice  age.      (See  Glacial;  Pleistocene  ) 
Ice  dam,  Pleistocene,  of  the  Ohio Bull  58,  pp  17-38,  76-101 
Ice  invasions,  the  great,  rock  scorings  of Ann  7,  pp  147-248 
Iceland,  fossil  plants  of,  literature  of Ann  8,  n,  p  830 
quicksilver  deposits  in Mon  xiii,  pp  24-26 
Ichnology  of  Massachusetts,  western Mon  xxix,  pp  400-404 
Ichthyornis,  description  and  restoration  of Ann  3,  pp  69-83 
Icy  Bay,  Alaska,  description  of Ann  1 3,  n,  p  13 
Idaho,  abrasive  material  in  Boise  quadrangle GF  45,  p  6 
agricultural  land  in  Priest  River  Forest  Reserve Ann  19,  v,  pp  240-242 
agricultural  possibilities  in Ann  16,  n,  pp  275-276 
altitudes  in Ann  18,  i,  pp  391-393;  Ann  19, 
i,  pp  355-356;  Ann  20,  i,  pp  471-474;  Ann  21,  i,  pp  517-524; 
Bull  5,  pp  84-86;  Bull  72,  p  225;  Bull  76;  Bull  160,  pp  132-135 
Alturas  (Blaine)  County,  gold,  silver,  and  lead  production  of,  1880-1898..  Ann 
20,  in,  p  192 
Bear  River,  flow  of,  measurements  of Ann  11, 
ii,  p  102;  Ann  12,  n,  pp  330,  352,  360;  Ann  13,  in,  pp 
96,  99;  Ann  14,  n,  pp  118-119;  Ann  18,  iv,  pp  311-316;  Ann 
19,  iv,  pp  431-433;  Ann  20,  iv,  pp  60,  459-460;  Ann  21,  iv,  p 
394;  Bull  131,  pp  53-55;  Bull  140,  pp  224-227;  WS  11,  p  76; 
WS  16,  p  157;  WS  28,  pp  149, 153, 154;  WS  38,  pp  332-334 
Bear  River  formation  in Bull  128,  pp  30-31 
Bitterroot  Forest  Reserve — lands,  timber,  fires,  etc  . .  Ann  19,  v,  pp  57-59,  253-282 
report  on Ann  20,  v,  pp  317-410 
Black  Hornet  mining  district,  geology,  mineral  deposits,  etc.,  of Ann  18, 
in,  pp  703-705 
