608  INDEX    TO    PUBLICATIONS    OF    U.    S.   GEOL.    SURVEY,     [bull.  177. 
Peridotite  of  California,  Lassen  Peak  quadrangle GF  15,  p  1 
of  California,  Placerville  quadrangle , GF  3,  p  2 
Smartsville  quadrangle GF  18,  p  4 
of  Colorado,  Silver  Cliff Ann  17,  n,  pp  283-284 
of  District  of  Columbia , GF  70,  p  3 
of  Kentucky,  Elliott  County,  composition,  origin,  etc.,  of Bull  38; 
Bull  42,  pp  136-137 
of  Maryland,  Washington  ( D.  C. )  quadrangle GF  70,  p  3 
<  >f  Michigan,  Crystal  Falls  district Mon  xxxvi,  pp  249-262 
Marquette  district ..Ann  15,  pp  509-511 ;  Mon  xxviii,  pp  183-186 
of  Minnesota,  southwestern Bull  157,  pp  110-114 
<  )f  Montana,  Three  Forks  quadrangle GF  24,  p  4 
of  Northwestern  States Ann  5,  pp  217-218 
of  Sierra  Nevada Ann  14,  n,  pp  476-477;  Ann  17,  i,  pp  577,  650,  671 
of  Virginia,  Washington  ( D.  C. )  quadrangle GF  70,  p  3 
thin  section  of,  from  Kentucky,  Elliott  County Bull  38,  p  11 
from  Minnesota,  southwestern  (saxonite) Bull  157,  pp  156-157 
Peridotite  and  associated  serpentines  of  Maryland,  near  Baltimore Bull  28,  p  50 
Peridotite  family  of  rocks,  scope  and  characteristics  of Ann  17,  i,  pp  733-735 
Periods,  Tertiary,  Pleistocene,  and  Recent,  comparative  lengths  of Ann  14, 
ii,  pp  382-384 
Peristerite,  occurrence  of MR  1883-84,  p  771;  MR  1887.  p  562 
Perkins  (J.),  lists  of  ores,  minerals,  and  mineral  substances  of  industrial  im- 
portance in   Alaska,    California,    Nevada,    Oregon,  and 
Washington MR  1882,  pp  760,  767-769,  772,  773,  775 
Perkiomen  Creek,  flow  of,  measurements  of Ann  20, 
iv,  pp  48,  89-94;  Ann  21,  iv,  pp  78-80;  WS  35,  pp  65-73 
Perlite,  analysis  of,  from  Nevada,  Eureka  (andesitic) Bull  90, 
p  72;  Bull  148,  p  189;  Bull  168,  p  175 
analysis  of,    from  Yellowstone  Park,  Midway  Geyser  Basin  (rhyolitic) 
Bull  148,  p  134;  Bull  150,  p  153;  Bull  168,  p  108 
from  Yellowstone  Park,  description  of,  as  one  of  the  educational  series 
(rhyolitic) Bull  150,  pp  151-153 
of  Yellowstone  Park Mon  xxxn,  n,  pp  369-372 
Permian  fossils  of  Texas Bull  77 
Permian  rocks  in  Kansas  and  Nebraska  and  other  parts  of  United  States,  dis- 
cussions relative  to  correlation  of Bull  80,  pp  193-212 
of  Grand  Canyon  district Ann  2,  pp  64,  91-94;  Mon  n,  pp  16,  43-46,  117-121 
of  Nebraska Ann  19,  iv,  p  738 
of  Plateau  country Ann  6,  pp  134-135,  184-185 
of  Texas Ann  21,  vn,  pp  102-103;  Bull  45,  pp  62-68 
and  its  Mesozoic  types  of  fossils Bull  77 
Shinarump  conglomerate Ann  2,  pp  91-93 
(See,  also,  Carboniferous.) 
Permo-Carboniferous  rocks  of  Colorado,  Rico  Mountains Ann  21,  n,  pp  27-28 
Permo-Triassic  Red  Beds  of  Texas Ann  21,  vn,  pp  100-103 
Perna  beds  of  Maryland .Bull  84,  p  333 
Perofskite,  composition  of Bull  150,  p  33 
Perrenoud  (G.  F. ),  talc,  statistics  of MR  1885,  pp  534-535 
Perrine  (C.  D.) ,  earthquakes  in  California,  1892-1898 Bulls  112, 
114,  129,  147,  155,  161 
Perry  (T.  O.) ,  experiments  with  windmills WS  20 
Persia;  fossil  plants  of,  literature  of Ann  8,  n,  p  797 
iron-ore  deposits  of Ann  16,  in,  pp  159-160 
petroleum  in Ann  21,  vi  cont,  p  292 
