FOR    THE    YEARS    1901-1905,    INCLUSIVE.  117 
Emmons  (Samuel  Franklin) — Continued. 
1 1 .  Platinum  in  copper  ores  in  Wyoming. 
U.  S.  Geol.  Surv.,  Bull.  no.  213,  pp.  94-97,  1903. 
Gives  a  brief  account  of  the  topography  and  geology  of  the  Medicine  Bow  Range  in  Wyom- 
ing and  the  occurrence  of  platinum  in  the  copper  ores  of  the  New  Rambler  mine. 
12.  [In  discussion  of  paper  by  W.  P.  Jenney,  "The  mineral  crest,  or  the  hydrostatic 
"   level  attained  by  the  ore-depositing  solutions  in  certain  mining  districts  of  the 
Great  Salt  Lake  Basin."] 
Am.  Inst.  Mg.  Engrs.,  Trans.,  vol.  33,  pp.  10(12-1063,  1903. 
13.  The  drainage  of  the  valley  of  Mexico. 
Abstract:  Science,  newser.,  vol.  17,  p.  309,  1903. 
14.  Genetic  classification  of  ore  deposits. 
Abstract:  Science,  new  ser.,  vol.  17,  pp.  541-542,  1903. 
15.  Theories  of  ore  deposition  historically  considered. 
Geol.   Soc.  Am.,  Bull.,  vol.  15,  pp.  1-28,  1904.     Eng.  &  Mg.  Jour.,  vol.  77,  pp.  117-119,  157-159, 
199-200,  237-238,  1904.     New  Zealand  Mines  Record,  vol.  7,  pp.  384-387,  426-429, 1904.    Sci.  Am. 
Suppl.,  vol.  60,  pp.  25046-25047,   25062-25064,  25078-25079,  1905.     Smith.   Inst.,  Ann.  Rept.  for 
1904,  pp.  309-336,  1905. 
Reviews  in  chronologic  order  the  various  theories  held  at  differei..  periods  of  time  regarding 
the  origin  of  ore  deposits. 
16.  The  Yirginius  mine. 
Eng.  &  Mg.  Jour.,  vol.  77,  p.  311,  1  fig.,  1904. 
Gives  observations  upon  the  occurrence  and  geologic  relations  of  the  ore  bodies  of  copper  and 
galena. 
17.  Investigation  of  metalliferous  ores. 
U.  S.  Geol.  Surv.  Bull.  no.  225,  pp.  18-24,  1904. 
Gives  a  short  summary  statement  respecting  the  economic  publications  of  the  preceding  year 
relating  to  metalliferous  ores  and  the  field  work  carried  on  in  this  division. 
18.  Occurrence  of  copper  ores  in  Carboniferous  limestone  in  the  region  of  the  Grand 
Canyon  of  the  Colorado. 
Abstract:  Science,  new  ser.,  vol.  20,  pp.  760-761,  1904. 
19.  Investigation  of  metalliferous  ores. 
U.  S.  Geol.  Surv.,  Bull.  no.  260,  pp.  19-27,  1905.  Reviews  the  publications  of  the  U.  S.  Geolog- 
ical Survey  during  the  year  1904  upon  metalliferous  ores,  and  the  economic  work  in  prog- 
ress during  the  year. 
2.0.  Copper  in  the  Red  Beds  of  the  Colorado  Plateau  region. 
U.  S.  Geol.  Surv.,  Bull.  no.  260,  pp.  221-232,  1905. 
Discussses  the  occurrence  of  copper  ores  in  foreign  and  American  Red  Beds  of  Permian  and 
Triassic  age,  and  their  origin,  and  more  particularly  an  occurrence  in  the  Colorado  Plateau 
region  of  Arizona. 
21.  The  Cactus  copper  mine,  Utah. 
U.  S.  Geol.  Surv.,  Bull.  no.  260,  pp.  242-248,  1  fig.,  1905. 
Describes  the  location  and  history  of  the  mine,  the  general  geology,  and  the  character  and 
occurrence  of  the  copper  ores. 
22.  Economic  geology  of  the  Bingham  mining  district,  Utah. 
U.  S.  Geol.  Surv.,  Professional  Paper  no.  38,  pp.  17-25,  1905. 
Describes  the  general  geology  of  the  region,  and  the  occurrence  and  character  of  Carbonifer- 
ous sedimentary  strata,  and  of  igneous  rocks. 
Emmons  (S.  F. ),  Hayes  (C.  W. ).,  geologists  in  charge. 
1.  Contributions  to  economic  geology,  1902. 
U.  S.  Geol.  Surv.,  Bull.  no.  213,  449  pp.,  1903. 
Contains  reports  by  different  members  of  the  staff  of  the  U.  S.  Geological  Survey  of  the  eco- 
nomic results  of  investigations  made  by  the  Geological  Survey,  and  bibliographies  of  the 
subjects  treated. 
2.  Contributions  to  economic  geology,  1903. 
U.  S.  Geol.  Surv.,  Bull.  no.  225,  527  pp.,  1  pi.,  11  figs.,  1904. 
