632  INDEX    TO    PUBLICATIONS    OF    IT.    S.    GEOL.    SURVEY,      [bull.  177. 
Powell  (J.  W. ),  resignation  of,  from  Directorship  of  the  Survey,  valedictory 
remarks  prompted  by Ann  15,  p  7 
statements  before  Committee  on  Irrigation  of  House  of  Representatives.  .Ann  11, 
ii,  pp  203-289 
Powell  River,  West  Virginia,  profile  of WS  44,  p  55 
Powellite,  a  new  mineral  species,  description  and  analysis  of Bull  90,  pp  34-37 
Power,  motive,  used  in  irrigation WS  1,  pp  17-25 
Power,  water,  in  California,  Kern  River Ann  19,  iv,  pp  524-52(3 
in  California,  San  Bernardino  Valley Ann  19,  iv,  pp  548,  551 
San  Joaquin  River Ann  19,  iv,  pp  516-518 
in  Georgia,  Altamaha  Basin Ann  20,  iv,  pp  166-169 
Ocmulgee  River Ann  20,  i v,  p  167 
Oconee  River Ann  20,  i v,  pp  167-168 
Savannah  Basin Ann  20,  i v,  pp  155-156 
Tugaloo  River Ann  20,  iv,  p  155 
Yellow  River Ann  20,  i v,  p  166 
in  Kansas,  Verdigris  River Ann  19,  i  v,  pp  375-376 
in  Maine Ann  19,  iv,  pp  34-111 
in  Michigan WS  30,  pp  18-22,  37-41 
in  New  York,  Erie  Canal WS  25,  pp  178-184 
Hudson  River,  tributaries  of WS  24,  pp  37,  40,  41 
Niagara  River WS  25,  pp  135-143 
price  and  possible  developments  of WS  25,  pp  184-186 
St.  Lawrence  River WS  25,  pp  143-144 
in  North  Carolina,  Cape  Fear  River  Basin Ann  19,  iv,  pp  187-192 
eastern Bull  140,  pp  65-66 
Knoxville  quadrangle GF  1 6,  p  6 
Roanoke  River  Basin Ann  19,  iv,  pp  174-178 
Yadkin  River  Basin Ann  19,  iv,  pp  194-200 
in  Shenandoah  Basin Ann  19,  iv,  pp  136-139,  156-161 
in  South  Carolina,  Broad  River  Basin Ann  19,  iv,  pp  215-219 
Catawba  River  Basin Ann  19,  iv,  pp  204-21 2 
Saluda  River Ann  19,  iv,  pp  221-222 
Yadkin  River  Basin Ann  19,  iv,  pp  194-200 
in  Tennessee,  Knoxville  quadrangle GF  16,  p  6 
Loudon  quadrangle GF  25,  p  6 
Morristown  quadrangle GF  27,  p  5 
on  Potomac  River Ann  21,  iv,  pp  100-106 
Pozzuolana,  analysis  of,  from  Contra  Costa  County,  California,  and  Rome, 
Italy MR  1883-84,  p  676 
Prairie  soils Ann  12,  i,  pp  323-326 
Prase,  occurrence  and  statistics  of MR  1883-84,  p  753;  Ann  17,  in  cont, 
p  923;  Ann  18,  v  cont,  p  1217;  Ann  19,  vi  cont,  p  513 
Pratt  (J.  H.),   tungsten,   molybdenum,   uranium,   and   vanadium  in  United 
States Ann  21,  vi,  pp  299-318 
Pre-Cambrian  geology,  North  American,  principles  of Ann  16,  i,  pp  571-843 
Pre-Cambrian  rocks  of  North  America,  review  of  present  state  of  knowledge 
of Bull  86 
Precious-metal  industry  in  United  States  from  1880  to  1892,  review  of MR  1892, 
pp  46-94 
Precious-metal  ore.     (See  Ore,  precious  metal.) 
Precious-metal  production  of  Colorado,  Custer  County Ann  1 7.  n,  p  420 
Precious  metals;  auriferous  beach  sands  of  Alaska Ann  18,  m,  pp  85-86 
