368  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Willey  (Day  Allen)— Continued. 
2.  The  oil  fields  of  the  West. 
Sci.  Am.,  vol.  93,  pp.  484,  4  figs.,  1905. 
A  discussion  of  the  production  of  petroleum  in  the  United  States. 
Williams  (E.  G.). 
1.  The  manganese  industry  of  the  Department  of  Panama,  Republic  of  Colombia. 
Am.  Inst.  Mg.  Engrs.,  Trans.,  vol.  33,  pp.  197-234,  9  figs.,  1903. 
Discusses  the  character  and  occurrence  of  the  manganese-ore  deposits  and  the  mining  opera 
tions. 
Williams  (Edward  H.,  jr.). 
1.  The  alleged  Parker  channel     [Pennsylvania.] 
Geol.  Soc.  Am.,  Bull.,  vol. .12,  p.  4G3,  1901. 
Describes  abandoned  channel  of  Allegheny  River. 
2.  Kansas  glaciation  and  its  effects  on  the  river  system  of  northern  Pennsylvania. 
Wyoming  [Pa.]  Hist.  &  Geol.  Soc,  Proc.  &  Coll.,  vol.  7,  pp.  21-28,  11  figs.,  1902. 
Discusses  drainage  modifications  produced  by  the  ice  of  the  Glacial  period. 
3.  Connection  by  precise  leveling  between  the  Atlantic  and  Pacific  oceans. 
Science,  new  ser.,  vol.  21,  p.  862,  1905. 
Williams  ( Henry  Shaler) . 
1.  The  discrimination  of  time  values  in  geology. 
Jour.  Geol.,  vol.  9,  pp.  570-585,  1901. 
Discusses  the  criteria  upon  which  the  classification  of  strata  should  depend  and  proposes  a 
plan  of  a  biochronic  classification  and  nomenclature. 
2.  Points  involved  in  the  Siluro-Devonian  boundary  question. 
Abstract:  Geol.  Soc.  Am.,  Bull.,  vol.  12,  pp.  472-473,  1901. 
Gives  brief  summary  of  questions  in  dispute. 
3.  Fossil  faunas  and  their  use  in  correlating  geological  formations. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  13,  pp.  417-432,  1902. 
Discusses  methods  of  employing  fossil  faunas  in  correlating  definite  formations  and  their 
limitations. 
4.  Shifting  of  faunas  as  a  problem  of  stratigraphic  geology. 
Geol.  Soc.  Am.,  Bull.,  vol.  14,  pp.  177-190,  1  pi.,  1903. 
Discusses  relationships  of  faunas  in  different  types  of  sediments  in  the  Devonian  of  New 
York,  Pennsylvania,  and  Ohio  and  their  shifting,  and  gives  rules  for  the  use  of  fossils  in 
stratigraphy. 
5.  The  correlation  of  geological  faunas,  a  contribution  to  Devonian  paleontology. 
U.  S.  Geol.  Surv.,  Bull.  no.  210,  147  pp.,  1903. 
Discusses  faunas  of  upper  Devonian,  with  especial  reference  to  the  statistics  of  the  species 
the  evidences  for  the  shiftings  of  faunas  and  the  consequences  thereof,  and  the  value  and 
use  of  fossils  in  correlation  work. 
6.  Note  on  the  Devonian  fossils  [of  the  Bisbee  quadrangle,  Arizona]. 
U.  S.  Geol.  Surv.,  Professional  Paper  no.  21,  pp.  35-42,  1  pi.,  1904. 
Gives  a  list  of  fossils  identified  with  their  occurrence  by  localities.  A  few  of  the  more  char- 
acteristic are  figured. 
7.  Preliminary  report  on  the  classification  of  the  rocks  of  the  Watkins  Glen  (30/) 
quadrangle  (U.  S.  Geological  Survey). 
Science,  new  ser.,  vol.  19,  pp.  234-236,  1904. 
Discusses  some  of  the  results  obtained  and  the  methods,  largely  paleontologic,  used  in  the 
stratigraphic  work. 
8.  Bearing  of  some  new  paleontologic  facts  on  nomenclature  and  classification  of 
sedimentary  formations. 
Geol.  Soc.  Am.,  Bull.,  vol.  16,  pp.  137-150,  1905. 
Williams  (Henry  Shaler)  and  Kindle  (Edward  M.). 
1.  Contributions  to  Devonian  paleontology,  1903. 
U.  S.  Geol.  Surv.,  Bull.  no.  244, 144  pp.,  6  pis.,  and  3  figs.,  1905. 
Describes  sections  of  Devonian  and  Mississippian  rocks  of  Virginia,  West  Virginia,  Kentucky, 
and  Pennsylvania,  gives  lists  of  the  species  identified  in  their  faunules,  and  discusses  the 
correlation,  range,  environment,  etc.,  of  these  faunules. 
