34  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Bell  (Robert) — Continued. 
6.  Volcanic  origin  of  natural  gas  and  petroleum. 
Can.  Mg.  Inst.,  Jour.,  vol  6,  pp.  126-128,  1904. 
7.  Summary  report  on  the  operations  of  the  Geological  Survey  of  Canada  for  the  cal- 
endar year  1903. 
Can.  Geol.  Surv.,  Summ.  Kept,  for  1903,  218  pp.,  1904. 
8.  Summary  report  of  the  Geological  Survey  of  Canada  for  the  calendar  year  1904. 
Can.  Geol.  Surv.,  Rept.  for  1904,  pp.  i-xxxviii,  1905. 
Outlines  the  work  of  the  Geological  Survey  of  Canada  for  the  year  1904.    Includes  the  report 
of  the  special  committee  on  the  Lake  Superior  region. 
9.  The  advantages  of  combining  topographical  with  geological  surveying  in  unex- 
plored regions. 
Abstract:  Can.  Mg.  Inst.,  Jour.,  vol.  8,  pp.  56-58,  1905. 
Bell  (Robert). 
1.  An  outline  of  Idaho  geology  and  of  the  principal  ore  deposits  of  Lemhi  and  Cus- 
ter counties,  Idaho. 
Int.  Mg.  Cong.,  4th  session,  Proc,  pp.  64  80,  1901. 
2.  Thunder  Mountain  and  Mackay,  Idaho. 
Min.  &  Sci.  Press,  vol.  84,  p.  62.  1902. 
Describes  the  occurrence  of  gold  and  developments  of  the  region. 
3.  The  origin  of  the  fine  gold  of  Snake  River. 
Eng.  &  Mg.  Jour.,  vol.  73,  pp.  143-144,  1902. 
Describes  the  occurrence  of  gold  bearing  terraces  of  a,  Tertiary  lake. 
4.  The  geology  of  Thunder  Mountain  and  central  Idaho. 
Eng.  &  Mg.  Jour.,  vol.  73,  pp.  791-793,  1902. 
Describes  the  general  geology  of  the  region. 
5.  Facts  about  Thunder  Mountain  [Idaho]. 
Eng.  &  Mg.  Jour.,  vol.  71,  pp.  273-275,  4  figs.,  1902. 
Contains  notes  on  the  geologic  structure  of  the  region  and  sections  of  strata, 
Bell  (Robert  N.). 
1.  Tin  ledges  in  Alaska. 
Eng.  &  Mg.  Jour.,  vol.  76,  p.  820,  1903. 
Describes  the  discovery  of  ledges  containing  tin  ore  in  the  vicinity  of  Port  Clarence,  Alaska. 
2.  Tin  in  Alaska. 
Mg.  &  Sci.  Press,  vol.  87,  p.  351,  1903. 
Describes  the  occurrence  of  tin-ore  deposits. 
3.  The  mining  industry  of  Idaho. 
Ores  &  Metals,  vol.  13,  no.  15,  pp.  22-32,  illus.,  1904. 
Gives  a  brief  account  of  the  general  geology  of  the  state,  and  the  occurrence  and  production 
of  ores  by  counties. 
4.  Geology  of  Park  City,  Utah,  district, 
Lead  &  Zinc  News,  vol.  8,  pp.  57,  60.  1904. 
Describes  the  general  geology  and  the  occurrence  of  lead-ore  deposits. 
5.  The  geology  and  mineral  resources  of  Idaho. 
Am.  Mg.  Cong.,  7th  Ann.  Sess.,  Rept.  of  Proc,  pp.  200-226,  1905. 
Bell  (W.  T.). 
1.  The  remarkable  concretions  of  Ottawa  County,  Kansas. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  11,  pp.  315-316,  2  figs.,  1901. 
Describes  the  occurrence  of  concretionary  masses  of  crystalline  limestone,  most  of  them  in 
place. 
Belowsky  (Max). 
Beitriige  zur  Petrographie  des  westlichen  Nord-Gronlands. 
•*'   v        Deutsch.  geol.  Gesellsch.,  Zeitscnr.,  Bd.  57,  pp.  15-19,  1905. 
