warman]  EOCENE— ERUPTIVE.  315 
Epidote,  thin  section  of  crystals  of,  from  Minnesota,  Pigeon  Point Bull  109,  p  74 
thin  section  of  gabbro-diorite  showing,  from  Maryland,  Mount  Hope  ...Bull  28, 
pp  68-69 
thin  section  of  porphyritic  diorite  showing,  from  Nevada,  Washoe  dis- 
trict   Mon  in,  pp  150-151 
Epidote  and  chlorite,  thin  section  of  diorite-porphyry  showing,  from  Nevada, 
Ophir  Ravine Mon  in,  pp  150-151 
Epidote-amphibolite,  thin  section  of,  from  Massachusetts Mon  xxix,  pp  306-307 
Epidote-chlorite-schist,  analysis  of,  from  North  Carolina Bull  168,  p  53 
Epidote-gneiss  of  Massachusetts,  eastern  Berkshire  County Bull  159,  pp  24-27 
Epidote-mica-gneiss  from  New  Hampshire,  Lebanon,  description  of,  as  one  of 
the  educational  series Bull  150,  pp  353-:  155 
Epidote-schist  of  Sierra  Nevada Ann  17,  i,  p  586 
Epidotic  rock,  analysis  of,  from  Pennsylvania,  Mount  Alto  furnace  ...Bull  136,  p  78 
Epidotization  a  kind  of  mineralogic  metamorphism Bull  62,  p  56 
Epiphanite,  analysis  of Bull  113,  p  21 
Epistilbite,  analysis  of Bull  125,  p  40 
chemical  com  position  of % Bull  125,  pp  40,  44,  102 
Equilibrium  of  solids,  chemical,  in  its  relation  to  pressure  and  to  temperature.  .Bull 
94,  pp  109-135 
Equisetaceae  from  Alaska Ann  17,  i,  p  877 
from  Cretaceous  of  Black  Hills Ann  19,  n,  p  650 
from  older  Mesozoic  of  North  Carolina Ann  20,  n,  pp  288-289 
from  Triassic  of  Pennsylvania. Ann  20,  n,  p  241 
from  Yellowstone  Park Mon  xxxn,  n,  pp  674-076 
of  North  America,  extinct Mon  xxxv,  pp  14-16 
Equisetales  from  Missouri,  Lower  Coal  Measures Mon  xxxvn,  pp  144-173 
Equisetese  from  older  Mesozoic  of  Virginia Mon  vi,  pp  10-18 
from  Potomac  or  younger  Mes<  >/-<  >ic Mon  xv,  pp  63-66,  334-335 
Equisetinese  from  Carboniferous  basins  of  southwestern  Missouri Bull  98,  pp  17-43 
Equus  beds  of  the  Great  Basin,  correlation  of Ann  18,  n,  p  336; 
Mon  i,  pp  393-402;  Bull  84,  pp  283-285,298-299,  317,  325 
Ericaceae  from  Alaska Ann  17,  i,  p  887 
from  Amboy  clays  of  New  Jersey Mon  xxvi,  pp  120-122 
from  Dakota  group Mon  xvn,  pp  115-119 
from  Yellowstone  Park Mon  xxxn,  n,  pp  750-751 
Erie  Canal,  decline  of WS  24,  pp  13-14 
history  and  description  of WS  25,  pp  147-149, 155-156, 157, 158-166 
water  power  on - WS  25,  pp  178-184 
P>ie,  Lake,  elevation  of,  mean  monthly,  at  Buffalo WS  24,  p  59 
Erinite,  analyses  of,  from  Utah,  Tintic  mining  district Ann  19, 
in,  p  698;  Bull  55,  pp  40-41 
Erodibility,  relation  of,  to  structure  and  forms  of  relief Ann  19,  n,  pp  18-19,  21 
Erosion.     (See  Degradation.) 
Erosional  forms  in  the  Hawaiian  Islands Ann  4,  pp  87-88 
Eruptions  in  Nevada,  Eureka  district,  age  of Mon  xx,  231-232 
Eruptive  rock,  analysis  of,  from  Arkansas,  Hot  Springs Bull  64,  p  48 
analysis  of,  from  California,  Pit  River,  Great  Bend  of Bull  64,  p  50 
from  Colorado,  various  localities Mon  xn,  p  358 
from  Kentucky,  Crittenden  County Bull  90,  pp  67-68 
from  Montana,  Castle  Mountain Bull  64,  p  49 
Madison  County,  Bear  Creek Bull  78,  p  123 
from  New  Mexico,  near  Grants Bull  27,  p  65 
San  Mateo  Mountains Bull  27,  p  64 
from  Utah,  Henry  Mountains Bull  60,  p  154 
