GEOLOGICAL  SURVEY  PUBLICATIONS  ON  GYPSUM,  SALT,  BORAX,  AND 
SODA. 
The  more  important  publications  of  the  United  States  Geological 
Survey  on  the  natural  lime,  sodium,  and  potassium  salts  included  in 
this  group  are  the  following: 
Adams,  G.  I.,  and  others.  Gypsum  deposits  of  the  United  States.  Bulletin 
U.  S.  Geol.  Survey,  No.  223,  123  pp.     1904. 
Boutwell,  J.  M.  Rock  gypsum  at  Nephi,  Utah.  In  Bulletin  225,  pp.  483- 
487. 
Campbell,  M.  R.  Reconnaissance  of  the  borax  deposits  of  Death  Valley  and 
Mohave  Desert.     Bulletin  No.  200.     23  pp.     1902. 
Borax  deposits  of  eastern  California.     In  Bulletin  No.  213.     pp.  401- 
405.     1903. 
Chatard,  T.  M.  Salt-making  processes  in  the  United  States.  In  Seventh 
Ann.  Kept,  pp.  491-535.     1888. 
Day,  W.  C.  Potassium  salts.  In  Mineral  Resources  U.  S.  for  1887,  pp.  628- 
(550.     1888. 
Sodium    salts.     In    Mineral    Resources    U.    S.    for    1887,    pp.    (551-658. 
1888. 
Eckel,  E,  C.  Salt  and  gypsum  deposits  of  southwestern  Virginia.  In  Bul- 
letin No.  213*.     pp.  406-416.     1903. 
Salt  industry  of  Utah  and  California.     Bulletin  U.   S.  Geol.   Survey 
No.  225.     pp.  488-495. 
Hilgard,  E.  W.  The  salines  of  Louisiana.  In  Mineral  Resources  U.  S.  for 
1882,  pp.  554-565.     1883. 
Orton,  E.     Gypsum  or  land  plaster  in  Ohio.     In  Mineral  Resources  U.  S.  for    | 
1887,  pp.  596-601.     1888. 
Packard,  R.  L.  Natural  sodium  salts.  In  Mineral  Resources  U.  S.  for  1893, 
pp.  728-738.     1894. 
Peale,  A.  C.  Natural  mineral  waters  of  the  United  States.  In  Fourteenth 
Ann.  Rept,  pt.  2,  pp.  49-88.     1894. 
Yale,  C.  G.     Borax.     In  Mineral  Resources  U.  S.  for  1889-1890,  pp.  494-506.   I 
1902. 
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