II  ADVERTISEMENT. 
B  L98.  The  Berea  grit  oil  sand  in  the  Cadiz  quadrangle,  Ohio,  by  W.  T.  Griswold.     1902.     43  pp.,  1  pi. 
PP  1.  Preliminary  report  on  the  Ketchikan  mining  district,  Alaska,  with  an  introductory  sketch  of 
the  geology  of  southeastern  Alaska,  by  Alfred  Hulse  Brooks.    1902.    120  pp.,  2  pis. 
B  200.  Reconnaissance  of  the  borax  deposits  of  Death  Valley  and  Mohave  Desert,  by  M.  R,  Campbell. 
1902.     23  pp.,  1  pi. 
B  202.  Tests  for  gold  and  silver  in  shales  from  western  Kansas,  by  Waldemar  Lindgren.    1902.    21  pp. 
PP  2.  Reconnaissance  of  the  northwestern  portion  of  Seward  Peninsula,  Alaska,  by  A.  J.  Collier. 
1902.     70  pp.,  11  pis. 
PP  10.  Reconnaissance  from  Fort  Hamlin  to  Kotzebue  Sound,  Alaska,  by  way  of  Dall,  Kanuti,  Allen, 
and  Kowak  rivers,  by  W.  C.  Mendenhall.    1902.    68  pp.,  10  pis. 
PP  11.  Clays  of  the  United  States  east  of  the  Mississippi  River,  by  Heinrich  Ries.    1903.    298  pp.,  9  pis. 
PP  12.  Geology  of  the  Globe  copper  district,  Arizona,  by  F.  L.  Ransome.    1903.    168  pp.,  27  pis. 
B  212.  Oil  fields  of  the  Texas-Louisiana  Gulf  Coastal  Plain,  by  C.  W.  Hayes  and  William  Kennedy. 
1903.     174  pp.,  11  pis. 
B  213.  Contributions  to  economic  geology,  1902;  S.  F.  Emmons,  C.  W.  Hayes,  geologists  in  charge. 
1903.  449  pp. 
PP  15.  The  mineral  resources  of  the  Mount  Wrangell  district,  Alaska,  by  W.  C.  Mendenhall  and 
F.  C.  Schrader.     1903.     71  pp.,  10  pis. 
B  218.  Coal  resources  of  the  Yukon,  Alaska,  by  A.  J.  Collier.    1903.    71  pp.,  6  pis. 
B  219.  The  ore  deposits  of  Tonopah,  Nevada  (preliminary  report),  by  J.  E.  Spurr.    1903.    31  pp.,  1  pi. 
PP  20.  A  reconnaissance  in  northern  Alaska,  in  1901,  by  F.  C.  Schrader.    1904.     139  pp.,  10  pis. 
PP  21.  Geology  and  ore  deposits  of  the  Bisbee  quadrangle,  Arizona,  by  F.  L.  Ransome.    1904.    168  pp., 
29  pis. 
B  223.  Gypsum  deposits  of  the  United  States,  by  G.  I.  Adams  and  others.    1904.    129  pp.,  21  pis. 
PP  24.  Zinc  and  lead  deposits  of  northern  Arkansas,  by  G.  I.  Adams.    1904.    lis  pp.,  27  pis. 
PP  25.  Copper  deposits  of  the  Encampment  district,  Wyoming,  by  A.  C.  Spencer.    1904.    107  pp.,  2  pis. 
B  225.  Contributions  to  economic  geology,  1903;  S.  F.  Emmons,  C,  W.  Hayes,  geologists  in  charge. 
1904.  527  pp.,  1  pi. 
PP  26.  Economic  resources  of  the  northern  Black  Hills,  by  J.  D.  Irving,  with  contributions  by  S.  F. 
Emmons  and  T.  A.  Jaggar,  jr.     1904.     222  pp.,  20  pis. 
PP  27.  A  geological  reconnaissance  across  the  Bitterroot  Range  and  Clearwater  Mountains  in  Mon- 
tana and  Idaho,  by  Waldemar  Lindgren.    1904.    123  pp.,  15  pis. 
B  229.  Tin  deposits  of  the  York  region,  Alaska,  by  A.  J.  Collier.    1904.    61  pp.,  7  pis. 
B  236.  The  Porcupine  placer  district,  Alaska,  by  C.  W.  Wright.     1904.     35  pp.,  10  pis. 
B  238.  Economic  geology  of  the  Iola  quadrangle,  Kansas,  by  G.  I.  Adams,  Erasmus  Haworth,  and 
W.  R.  Crane.     1904.    83  pp.,  11  pis. 
B  243.  Cement  materials  and  industry  of  the  United  States,  by  E.  C.  Eckel.    1905.    395  pp.,  15  pis. 
B  246.  Zinc  and  lead  deposits  of  northwestern  Illinois,  by  H.  Foster  Bain.    1904.    56  pp.,  5  pis. 
B  247.  The  Fairhaven  gold  placers,  Seward  Peninsula,  Alaska,  by  F.  H.  Moffit.     1905.     85  pp.,  14  pis. 
B  249.  Limestones  of  southeastern  Pennsylvania,  by  F.  G.  Clapp.    1905.    52  pp.,  7  pis. 
B  250.  The  petroleum  fields  of  the  Pacific  coast  of  Alaska,  with  an  account  of  the  Bering  River  coal 
deposits,  by  G.  C.  Martin.     1905.     65  pp.,  7  pis. 
B  251.  The  gold  placers  of  the  Fortymile,  Birch  Creek,  and  Fairbanks  regions,  Alaska,  by  L.  M.  Prindle. 
1905.  89  pp.,  16  pis. 
WS  117.  The  lignite  of  North  Dakota  and  its  relation  to  irrigation,  by  F.  A.  Wilder.     1905.    59  pp., 
8  pis. 
PP  36.  The  lead,  zinc,  and  fluorspar  deposits  of  western  Kentucky,  by  E.  O.  Ulrich  and  W.  S.  T.  Smith. 
1905.     218  pp.,  15  pis. 
PP  38.  Economic  geology  of  the  Bingham  mining  district  of  Utah,  by  J.  M.  Boutwell,  with  a  chapter 
on  areal  geology,  by  Arthur  Keith,  and  an  introduction  on  general  geology,  by  S.  F.  Emmons. 
1905.    —pp.,  49  pis. 
PP  41.  The  geology  of  the  central  Copper  River  region,  Alaska,  by  W.  C.  Mendenhall.    1905.    —  pp., 
—  pis. 
B  254.  Report  of  progress  in  the  geological  resurvey  of  the  Cripple  Creek  district,  Colorado,  by  Walde- 
mar Lindgren  and  F.  L.  Ransome.     1904.    36  pp. 
B  255.  The  fluorspar  deposits  of  southern  Illinois,  by  H.  Foster  Bain.     1905.     75  pp.,  6  pis. 
B  256.  Mineral  resources  of  the  Elders  Ridge  quadrangle,  Pennsylvania,   by  R.  W.  Stone.  •  1905. 
—  pp.,  — pis. 
B  259.  Report  on  progress  of  investigations  of  mineral  resources  of  Alaska,  in  1904,  by  A.  H.  Brooks 
and  others.    1905.     196  pp.,  3  pis. 
B  260.  Contributions  to  economic  geology,  1904;  S.  F.  Emmons,  C.  W.  Hayes,  geologists  in  charge. 
1905.    620  pp.,  4  pis. 
Correspondence  should  be  addressed  to 
The  Director, 
United  States  Geological  Survey, 
Washington,  D.  C. 
May,  1905. 
