PHOSPHATES  AND  OTHER  FERTILIZERS. 
PUBLICATIONS  ON  PHOSPHATES  AND  OTHER  FERTILIZERS, 
The  following  papers  relative  to  natural  mineral  materials  used  as 
fertilizers  have  been  published  by  the  United  States  Geological  Sur- 
vey, or  by  members  of  its  staff: 
Darton,  N.  H.  Notes  on  the  geology  of  the  Florida  phosphates.  In  Am.  Jour. 
Sci.,  3d  series,  vol.  41,  pp.  102-105.     1891. 
Eckel,  E.  C.  Recently  discovered  extension  of  Tennessee  white  phosphate  field. 
In  Mineral  Resources  U.  S.  for  1900,  pp.  812-813.     1901. 
The  white  phosphates  of  Decatur  County,  Tenn.     In  Bulletin  U.  S.  Geol. 
Survey  No.  213,  pp.  424-425.     1903. 
Eldridge,  G.  H.  A  preliminary  sketch  of  the  phosphates  of  Florida.  In  Trans. 
Am.  Inst.  Min.  Eng.,  vol.  21,  pp.  196-231.     1893. 
Hayes,  C  W.  The  Tennessee  phosphates.  In  Sixteenth  Ann.  Rept.  U.  S.  Geol. 
Survey,  pt,  4,  pp.  610-630.     1895. 
The  Tennessee  phosphates.  In  Seventeenth  Ann.  Rept.  U.  S.  Geol.  Sur- 
vey, pt.  2,  pp.  1-38.     1896. 
The  white  phosphates'  of  Tennessee.     Trans.  Am.  Inst.  Min.  Eng. ,  vol.  25, 
pp.  19-28.     1896. 
A  brief  reconnaissance  of  the  Tennessee  phosphate  field.     In  Twentieth 
Ann.  Rept.  U.  S.  Geol.  Survey,  pt.  6,  pp.  633-638.     1899. 
The  geological  relations  of  the  Tennessee  brown  phosphates.     In  Science, 
vol.  12,  p.  1005.     1900. 
Tennessee  white  phosphate.  In  Twenty-first  Ann.  Rept.  U.  S.  Geol.  Sur- 
vey, pt.  3,  pp.  473-485.     1901. 
Origin  and  extent  of  the  Tennessee  white  phosphates.     In  Bulletin  U.  S. 
Geol.  Survey  No.  213,  p.  418-423.     1903. 
InLSENG,  M.  C.  A  phosphate  prospect  in  Pennsylvania.  In  Seventeenth  Ann. 
Rept.  U.  S.  Geol.  Survey,  pt.  3,  pp.  955-957.     1896. 
Memminger,  C.  G.  Commercial  development  of  the  Tennessee  phosphates.  In 
Sixteenth  Ann.  Rept.  U.  S.  Geol.  Survey,  pt.  4,  pp.  631-635.     1895. 
Moses,  O.  A.  The  phosphate  deposits  of  South  Carolina.  In  Mineral  Resources 
U.  S.  for  1882,  pp.  504-521.     1883. 
Orton,  E.  Gypsum  or  land  plaster  in  Ohio.  In  Mineral  Resources  U.  S.  for  1887, 
pp.  596-601.     1888. 
Penrose,  R.  A.  F.  Nature  and  origin  of  deposits  of  phosphate  of  lime.  Bulletin 
U.  S.  Geol.  Survey  No.  46.     143  pp.     1888. 
Stubbs,  W.  C.  Phosphates  of  Alabama.  In  Mineral  Resources  U.  S.  for  1883-84, 
pp.  794-803.     1885. 
Wilber,   F.   A.     Greensand  marls  in  the  United  States.     In  Mineral  Resources 
U.  S.  for  1882,  pp.  522-526.     1883. 
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