II  ADVERTISEMENT. 
PP  10.  Reconnaissance  from  Fort  Hamlin  to  Kotzebue  Sound,  Alaska,  by  way  of  Dall,  Kanuti,  Allen, 
and  Kowak  rivers,  by  W.  C.  Mendenhall.    1902.    (58  pp.,  10  pis. 
PP  ii.  Claysofthe  United  States  east  of  the  Mississippi  River,  by  Heinrich  Ries.    1903.    298pp. ,  9  pis. 
PP  12.  Geology  of  the  Globe  copper  district,  Arizona,  by  F.  L.  Ransome.    1903.    1G8  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.,  16  pis. 
PP  21.  Geology  and  ore  deposits  of  the  Bisbee  quadrangle,  Arizona,  by  F.  L.  Ransome.    1904.    —  pp., 
29  pis. 
B  223.  Gypsum  deposits  of  the  United  States,  by  G.  I.  Adams  and  others.    1904.    —  pp.,  21  pis. 
PP  24.  Zinc  and  lead  deposits  of  northern  Arkansas,  by  G.  I.  Adams.    1904.    —  pp.,  27  pis. 
PP  25.  Copper  deposits  of  the  Encampment  district,  Wyoming-Colorado,  by  A.  C.  Spencer.     1904. 
—  pp.,  2  pis. 
B  225.  Contributions  to  economic  geology,  1903;  S.  F.  Emmons,  C.  W.  Hayes,  geologists  in  charge. 
1904.  527  pp.,  1  pi. 
Correspondence  should  be  addressed  to 
The  Director, 
United  States  Geological  Survey, 
Washington,  D.  C. 
April,  1904. 
I 
