76  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Coste  (Eugene) — Contiimed. 
2.  Volcanic  origin  of  natural  gas  and  petroleum. 
Can.  Mg.  Inst,  Jour.,  vol.  6,  pp.  73-123,  1904. 
Gives  a  full  presentation  of  facts  confirmatory  of  the  theory  of  the  volcanic  origin  of  natural 
gas  and  petroleum. 
3.  The  volcanic  origin  of  oil. 
Am.  Inst.  Mg.  Engrs.,  Trans.,  vol.  35,  pp.  288-297,  1905. 
4.  Volcanic  origin  of  oil. 
Franklin  Inst.,  Jour.,  vol.  157,  pp.  443-454,  1904. 
Discusses  volcanic  origin  of  oil  with  particular  reference  to  the  Texas-Louisiana  oil  district. 
Courtis  (W.  M.). 
1.    [In  discussion  of  paper  by  G.  O.  Smith  and  Bailey  AVillis  on  "  The  Clealum  iron 
ores,  Washington."] 
Am.  Inst.  Mg.  Engrs.,  Trans.,  vol.  30,  pp.  1116-1117,  1901. 
Gives  additional  analyses  of  these  ores. 
Cowan  (John  L.) . 
1.  The  arsenic  mines  at  Brinton,  Virginia. 
Eng.  &  Mg.  Jour.,  vol.  78,  pp.  105-106,  2  figs.,  1904. 
Describes  the  occurrence  of  arsenic  ores  at  Brinton,  Virginia,  and  their  economic  develop- 
ment. 
Cowles  (HenxyC. ). 
1.  The  relation  between  baseleveling  and  plant  distribution. 
Abstract:  Science,  new  ser.,  vol.  13,  pp.  372-373,  1901. 
2.  The  influence  of  underlying  rocks  on  the  character  of  the  vegetation. 
Am.  Bur.  Geog.,  Bull.,  vol.  2,  pp.  163-176,  376-388,  10  figs.,  1901. 
Cragin  (Francis  Whittemore). 
1.  A  study  of  some  teleosts  from  the  Russell  substage  of  the  Platte  Cretaceous  series. 
Colo.  Coll.  Studies,  vol.  9,  pp.  25-37,  3  pis.,  1901. 
2.  Paleontology  of  the  Malone  Jurassic  formation  of  Texas. 
U.  S.  Geol.  Surv.,  Bull.,  no.  266,  pp.  9-22,  34-172,  29  pis.,  1905. 
Discusses  the  occurrence  and  geologic  horizon  of  Jurassic  fossils  in  the  Malone  Mountains 
region  of  Texas  and  gives  systematic  descriptions  of  the  species. 
Crane  (W.  R.). 
1.  Kansas  coal  mining. 
Eng.  and  Mg.  Jour.,  vol.  72,  pp.  748-752,  7  figs.,  1901. 
Describes  the  distribution  and  characters  of  the  coal-bearing  strata. 
2.  The  Kansas  coal  mines  of  the  Missouri  Valley. 
Eng.  &Mg.  Jour.,  vol.  74,  pp.  514-516,  1902. 
Contains  notes  on  the  geologic  occurrence  of  the  coal  seams. 
3.  Asphalt  refining.     Methods  employed  in  the  Tar  Springs  Asphalt  Co.' s  refinery, 
near  Comanche,  Ind.  T. 
Mines  &  Minerals,  vol.  23,  pp.  337-341,  4  figs.,  1903. 
Contains  observations  on  the  character  and  occurrence  of  asphalt  deposits. 
4.  Coal  fields  ^f  Kansas.     Recent  discoveries  and  developments  in  the  Cretaceous 
formation  in  the  northern  central  portion  of  the  State. 
Mines  &  Minerals,  vol.  24,  p.  94,  1  fig.,  1903. 
Describes  the  occurrence  of  a  workable  coal  seam  and  gives  a  section  of  the  strata  penetrated 
by  a  shaft. 
5.  Coal  mining  in  the  Indian  Territory — the  southwestern  field. 
Eng.  &  Mg.  Jour.,  vol.  76,  pp.  577-581,  7  figs.,  1903. 
Describes  the  character  and  occurrence  of  the  coal  seams  and  the  methods  of  mining 
6.  The  Pratt  coal  mines  in  Alabama. 
Eng.  &  Mg.  Jour.,  vol.  79,  pp.  177-180,  2  figs.,  1905. 
Describes  the  occurrence  of  coal  and  the  geologic  structure  of  the  coal  fields. 
