BIBLIOGRAPHY.  423 
ARKANSAS. 
The  coal  fields  of  Arkansas,  by  J.  C.  Branner.     Mineral  Resources  U.  S.  for  1892, 
1893,  pp.  303-306. 
Preliminary  report  on  the  Camden  coal  field  of  southwestern  Arkansas,  by  J.  A. 
Taff.     Twenty-first  Ann.  Kept.,  pt.  2,  1900,  pp.  313-329. 
The  southwestern  coal  field,  by  J.  A.  Taff.     Twenty-second  Ann.  Rept.,  pt.  3,  1902, 
pp.  367-413. 
An  account  of  the  coals  of  Arkansas,  Indian  Territory,  and  northern  Texas. 
Fayette ville  folio,  Arkansas-Missouri,  description,  byG.  I.  Adams  and  E.  O.  Ulrich. 
Geologic  Atlas  U.  S.,  folio  119,  1905,  p.  6. 
The  Arkansas  coal  field,  by  A.  J.  Collier.     Bull.  No.  316,  1907,  pp.  137-160. 
The  Arkansas  coal  field,  by  A.  J.  Collier,  with  reports  on  the  paleontology  by  David 
White  and  G.  H.  Girty.     Bull.  No.  326,  1907.     158  pp. 
Winslow  folio,  Arkansas-Indian  Territory;  description,  by  A.  H.  Purdue.     Geologic 
Atlas  U.  S.,  folio  154,  1907.     6  pp. 
CALIFORNIA. 
The  coal  deposits  of  California,  by  H.  W.  Turner.     Mineral  Resources  U.  S.  for 
1892,  1893,  pp.  308-310. 
Sacramento  folio,  California;  description,  by  Waldemar  Lindgren.     Geologic  Atlas 
U.  S.,  folio  5,  1894. 
Jackson  folio,  California;  description,  by  H.  W.  Turner.     Geologic  Atlas  U.  S.,  folio 
11,  1894. 
Lassen  Peak  folio,  California;  description,  by  J.  S.  Diller.     Geologic  Atlas  U.  S., 
folio  15,  1895. 
Marysville  folio,  California;  description,  by  Waldemar  Lindgren  and  H.  W.  Turner. 
Geologic  Atlas  U.  S.,  folio  17,  1895. 
The  coal  fields  of  the  Pacific  coast,  by  G.  O.  Smith.     Twenty-second  Ann.  Rept., 
pt.  3,  1902,  pp.  473-513. 
An  account  of  the  coals  occurring  in  Washington,  California,  and  Oregon. 
Coal  in  the  Mount  Diablo  Range,  Monterey  County,  Cal.,  by  Ralph  Arnold.     Bull. 
No.  285,  1906,  pp.  223-225. 
Coal  of  Stone  Canyon,  Monterey  County,  Cal.,  by  M.  R.  Campbell.     Bull.  No.  316, 
1907,  pp.  435-438. 
COLORADO. 
A  report  of  work  done  in  the  division  of  chemistry  and  physics  mainly  during  the 
fiscal  year  1888-'89,  by  F.  W.  Clarke.     Bull.  No.  64,  1890,  p.  55. 
Gives  analyses  of  coals  from  Gunnison  County,  Colo. 
Coal  fields  of  Colorado,  by  R.  C.  Hills.     Mineral  Resources  U.  S.  for  1892,  1893,  pp. 
319-365. 
Anthracite-Crested  Butte  folio,   Colorado;  description  of  the  sedimentary  forma- 
tions, by  G.  H.  Eldridge.     Geologic  Atlas  U.  S.,  folio  9,  1894. 
Geology  of  the  Denver  Basin  in  Colorado;  economic  geology,  by  G.  H.  Eldridge. 
Monograph  XXVII,  1896,  pp.  317-387. 
Elmoro  folio,  Colorado;  description,  by  R.  C.  Hills.     Geologic  Atlas  U.  S.,  folio  58, 
1899. 
La  Plata  folio,  Colorado;  economic  geology,  by  C.  W.  Purington.     Geologic  Atlas 
U.  S.,  folio  60,  1899,  p.  14. 
