LAKE   SUPERIOR   REGION.  401 
301  Report  of  J.  B.  Campbell.     Idem,  vol.  11,  No.  175,  pp.  4-8. 
302  Report  of  George  N.  Sanders.     Idem,  pp.  8-34. 
808  Report  of  A.  B.  Gray.     Idem,  pp.  15-22. 
304  Report  of  A.  B.  Gray  on  mineral  lands  of  Lake  Superior.  Executive  Docs., 
1st  sess.  29th  Cong.,  1845-16,  vol.  7,  No.  211,  pp.  23,  with  map. 
305  On  the  origin  of  the  actual  outlines  of  Lake  Superior  (discussion),  by  Wil- 
liam B.  Rogers.     Proc.  Am.  Assoc.  Adv.  Sci.,  1st  meeting,  184S,  pp.  79-80. 
300  The  outlines  of  Lake  Superior,  by  Louis  Agassiz.  Lake  Superior,  its  phy- 
sical character,  vegetation,  and  animals,  compared  with  those  of  other  and 
similar  regions,  by  Louis  Agassiz  and  J.  Elliott  Cabot,  pp.  417^26.  See  also 
Proc.  Am.  Assoc.  Adv.  Sci.,  1st  meeting,  1848,  p.  79. 
307  Abstract  of  an  introduction  to  the  final  report  of  the  geological  surveys 
made  in  Wisconsin,  Iowa,  and  Minnesota,  in  the  years  1847,  1848,  1849,  and  1850, 
containing  a  synopsis  of  the  geological  features  of  the  country,  by  David  D. 
Owen.     Proc.  Am.  Assoc.  Adv.  Sci.,  5th  meeting,  1851,  pp.  119-132. 
308  On  the  age,  character,  and  true  geological  position  of  the  Lake  Superior 
red  sandstone  formation,  by  David  D.  Owen.  Report  of  a  Geological  Survey 
of  Wisconsin,  Iowa,  and  Minnesota,  1852,  pp.  1S7-193. 
309  A  geological  map  of  the  United  States  and  the  British  Provinces  of  North 
America,  with  an  explanatory  text,  geological  sections,  etc.,  by  Jules  Marcou. 
Boston,  1853,  pp.  92.  See  also  Reponse  a  la  lettre  de  MM.  Foster  et  Whitney 
sur  le  Lac  Superieur.     Bull.  Soc.  geol.  France,  2d  ser.,  vol.  8,  1851,  pp.  101-105. 
310  The  metallic  wealth  of  the  United  States,  by  J.  I).  Whitney.  Philadelphia, 
3854,  pp.  510. 
311  Observations  on  the  geology  and  mineralogy  of  the  region  embracing  the 
sources  of  the  Mississippi  River,  and' the  Great  Lake  basins,  during  the  expedi- 
tion of  1820,  by  Henry  R.  Schoolcraft.  Summary  narrative  of  an  exploratory 
expedition  to  the  sources  of  the  Mississippi  River,  in  1820,  resumed  and  com- 
pleted by  the  discovery  of  its  origin  in  Itasca  Lake,  in  1832.  Philadelphia,  1854, 
pp.  303-3G2. 
31"  Remarks  on  some  points  connected  with  the  geology  of  the  north  shore  of 
Lake  Superior,  by  J.  D.  Whitney.  Proc.  Am.  Assoc.  Adv.  Sci.,  9th  meeting,  1855, 
pp.  204-209. 
313  On  the  occurrence  of  the  ores  of  iron  in  the  Azoic  system,  by  J.  D.  Whitney. 
Idem,  pp.  209-210. 
314  Remarks  on  the  Huronian  and  Laurentian  systems  of  the  Canada  Geological 
Survey,  by  J.  D.  Whitney.    Am.  Jour.  Sci.,  2d  ser.,  vol.  23,  1857,  pp.  305-314. 
315  Physical  geology  of  Lake  Superior,  by  Charles  Whittlesey.  Proc.  Am. 
Assoc.  Adv.  Sci.,  24th  meeting,  1875,  pt.  2,  pp.  00-72,  with  map. 
310  The  copper-bearing  rocks  of  Lake  Superior,  by  R.  D.  Irving.  Mon.  U.  S. 
Geol.  Survey,  vol.  5,  1S83,  pp.  464,  15  1.,  29  pis.  and  maps.  See  also  Third  Ann. 
Rept.  U.  S.  Geol.  Survey,  1883,  pp.  89-188,  15  pis.  and  maps;  Science,  vol.  1, 
1883,  pp.  140,  359,  422;  Am.  Jour.  Sci.,  3d  ser.,  vol.  28,  1884,  p.  462;  vol.  29,  1885, 
pp.  67-68,  258-259,  339-340. 
317  The  copper-bearing  series  of  Lake  Superior,  by  T.  C.  Chamberlin.  Science, 
vol.  1,  3883,  pp.  453-155. 
318  On  secondary  enlargements  of  mineral  fragments  in  certain  rocks,  by  R.  D. 
Irving  and  C.  R.  Van  Hise.     Bull.  U.  S.  Geol.  Survey  No.  8,  1884,  56  pp..  <'»  pis. 
319  Divisibility  of  the  Archaean  in  the  Northwest,  by  R.  D.  Irving.  Am.  Jour. 
Sci.,  3d  ser.,  vol.  29,  3SS5,  pp.  237  IMP. 
3"°  Preliminary  paper  on  an  investigation  of  the  Archaean  formations  of  the 
Northwestern  States,  by  R.  D.  Irving.  Fifth  Ann.  Rept.  U.  S.  Geol.  Survey, 
1885,  pp.  175-242,  10  pis. 
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