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: 
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. 
Rept,  pp.  491-535.     1888. 
Day,  W.  C.  Potassium  salts.  In  Mineral  Resources  U.  S.  for  1887,  pp.  628- 
650.     1888. 
Sodium  salts.     In  Mineral  Resources  U.  S.  for  1887,  pp.  651-658.     1888. 
Eckel,  E.  C.     Salt  and  gypsum  deposits  of  southwestern  Virginia.     In  Bulletin 
No.  213.     pp.  406-416.     1903. 
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.  1902. 
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