warman.]      FOURTEENTH    AND    FIFTEENTH    ANNUAL    REPORTS.  17 
Pt.    I.  Director's  report  and  reports  of  chiefs  of  divisions— Continued. 
Administrative  reports  of  chiefs  of  divisions,  pp.  167-318. 
Index,  pp.  319-321. 
Pt.  II.  Accompanying  papers,     xx,  597  pp.,  74  pis.  and  maps. 
The  potable  waters  of  eastern  United  .States,  by  W  J  McGee,  pp.  1-47. 
Natural  mineral  waters  of  the  United  States,  by  A.  C.  Peale,  pp.  49-88 
pis.  iii-iv. 
Results  of  stream  measurements,  by  F.  II.  Newell,  pp.  89-155,  pis.  v-vi. 
The  laccolitic  mountain  groups  of  Colorado,  Utah,  and  Arizona,  by  Whit- 
man Uross,  pp.  157-241,  pis.  vii-xvi. 
The  gold-silver  veins  of  Ophir,  California,  by  Waldemar  Lindgren,  pp. 
243-284,  pis.  xvii,  xviii. 
Geology  of  the  Catoctin  belt,  by  Arthur  Keith,  pp.  285-395,  pis.  xix-xxxix. 
Tertiary  revolution  in  the  topography  of  the  Pacific  coast,  by  J.  S.  Diller, 
pp.  397-434,  pis.  xl-xlvii. 
The  rocks  of  the  Sierra  Nevada,  byH.W.  Turner,  pp.  435-495,  pis.  xlviii-lix. 
Pre-Cambrian  igneous  rocks  of  the  Unkar  terrane,  Grand  Canyon  of  the 
Colorado,  Arizona,  by  Charles  D.  Walcott;  with  notes  on  the  petro- 
graphic  character  of  the  lavas,  by  Joseph  Paxson  hidings,  pp.  497-524, 
pis.  lx-lxv. 
Gn  the  structure  of  the  ridge  between  the  Taconic  and  Green  Mountain 
ranges  in  Vermont,  by  T.  Nelson  Dale,  pp.  525-549,  pis.  lxvi-lxx. 
The  structure  of  Monument  Mountain,  in  Great  Barrington,  Massachu- 
setts, by  T.  Nelson  Dale,  pp.  551-565,  pis.  lxxi,  lxxii. 
The  Potomac  and  Roaring  Creek  coal  fields,  in  West  Virginia,  by  Joseph 
D.  Weeks,  pp.  567-590,  pis.  lxxiii,  lxxiv. 
Index,  pp.  591-597. 
Note. — A  pocket  in  the  cover  of  Part   II  carries  a  reconnaissance  map  of  the  United 
States  showing  the  distribution  of  the  geologic  systems  as  far  as  known,  compiled 
from  data  in  the  possession  of  the  United  States  ( reological  Survey,  by  W  J  McGee, 
1S93.      (See  notes  to  Fifth  and  Twenty-first  annual  reports,  pp.  12,  31,  of  this  bulletin.) 
Fifteenth  Annual  Report  of  the  United  States  Geological  Survey  to 
the  Secretary  of  the  Interior  1893-94  by  ,1.  W.  Powell  Director 
[Vignette]     Washington     Government  Printing  Office     1895 
8°.  xiv,  755  pp.,  48  pis.  an«l  maps.  Bound  in  dark  maroon  cloth  (Survey  edition). 
Out  of  stock.     Separates  of  the  various  papers  were  issued,  in  paper  covers. 
Report  of  the  Director,  pp.  3-1  OS,  pi.  i. 
Administrative  reports  of  chiefs  of  divisions,  pp.  109-251. 
Preliminary  report  on  the  geology  of  the  common  roads  of  the  United  States,  by 
Nathaniel  Southgate  Shaler,  pp.  255-306. 
The  Potomac  formation,  by  Lester  Frank  Ward,  pp.  307-397,  pis.  ii-iv. 
Sketch  of  the  geology  of  the  San  Francisco  peninsula,  by  Andrew  C.  Lawson, 
pp.  399-47(3,  pis.  v-xii. 
Preliminary  report  on  the  Marquette  iron-bearing  district  of  Michigan,  by 
Charles  Richard  Van  Hise  and  William  Shirley  Bayley,  with  a  chapter  on  the 
Republic  trough,  by  Henry  Lloyd  Smyth,  pp.  477-650,  pis.  xiii-xxvi. 
The  origin  and  relations  of  central  Maryland  granites,  by  Charles  Rollin  Keyes, 
with  an  introduction  on  the  general  relations  of  the  granitic  rocks  in  the  Mid- 
dle Atlantic  Piedmont  Plateau,  by  George  Huntington  Williams,  pp.  651-740, 
pis.  xxvii-xlviii. 
Index,  pp.  741-755. 
Sixteenth  Annual  Report  of  the  United  States  Geological  Survey  to 
the  Secretary  of  the  Interior    1S94-95    Charles  D.  Walcott    Director 
Bull.  177—01 2 
