IV  SERIES    LIST. 
B 304.  Oil  and  gas  fields  of  Greene  County,  Pa.,  bj  Ralph  W.  Stone  and   Frederick  G.  Clapp.     1906. 
110  pp.,  3  pis. 
r  56.  Geography  and  Geology  of  a  portion  of  southwestern  Wyoming,  with  special  reference  to  coal 
and  oil,  by  A.  C.  Veatch.    1907.    —pp.,  '26  pis. 
B  108    a  geologic  reconnaissance  in  southwestern  Nevada  and  eastern  California,  by  8.  H.  Ball.    l(.>07. 
218  pp..  3  pis; 
B  309.  The  Santa  Clara  Valley,  Pueate  Hills,  and  Los  Angeles  oil  districts,  southern  California,  by 
G.  II.  Eldridge  and  Ralph  Arnold.     1907.     —  pp.,  41  pis. 
B  312.  The  interaction  between  minerals  and  water  solutions,  with  special  reference  to  geologic 
phenomena,  by  E.  C.  Sullivan.     1907.    69  pp. 
B  313.  The  granites  of  Maine,  by  T.  Nelson  Dale,  with  an  introduction  by  (i.  <>.  smith.     1907.     —  pp., 
14  pis. 
B  314.  Report  of  progress  Of   investigations  of  mineral   resources  of  Alaska   in    1906,  by  A.  II.  Brooks 
and  others.    1907.    — pp.,  4  pis. 
B  315.  Contributions  to  economic  geology,  1906,  Part    1:   Metals  and    nonmetals.  except    fuels;  S.   F. 
Emmons  and  E.  C.  Eckel,  geologists  in  charge.     1907.     604  pp  .  l  pis. 
Correspondence  should  be  addressed  to 
The  Director, 
April,    L903 
United  States  Geological  Survey, 
Washington,  I).  C. 
o 
