LAKE   SUPERIOR   REGION.  393 
J.  G.  Norwood.  Report  of  a  Geological  Survey  of  Wisconsin,  Iowa,  and  Minne- 
sota, 1852,  pp.  209-418. 
133 Report  of  the  State  geologist  on  the  metalliferous  region  bordering  on  Lake 
Superior,  by  Henry  H.  Eames.     St.  Paul,  1866,  pp.  21. 
134  Geological  reconnaissance  of  the  northern,  middle,  and  other  counties  of 
Minnesota,  by  Henry  PI.  Eames.     St.  Paul,  1866,  pp.  58. 
1:55  Notes  upon  the  geology  of  some  portions  of  Minnesota,  from  St.  Paul  to  the 
western  part  of  the  State,  by  James  Hall.  Trans.  Am.  Philos.  Soc,  new  ser., 
vol.  13,  1869,  pp.  329-340. 
""Report  on  the  geological  survey  of  the  State  of  Iowa,  containing  results  of 
examinations  and  observations  made  within  the  years  1866,  1867,  1868,  and 
1889,  by  Charles  A.  White.     Des  Moines,  1870,  pp.  391. 
137  First  Ann.  Rept.  Geol.  and  Nat.  Hist.  Survey  Minnesota,  by  N.  H.  WTinchell, 
1S73,  pp.  129.  ' 
138  The  geology  of  the  Minnesota  Valley,  by  N.  II.  Winchell.  Second  Rept. 
Geol.  and  Nat.  Plist.  Survey  Minnesota,  1871,  pp.  127-212. 
139Ueber  die  krystallinischen  Gesteine  von  Minnesota  in  Nord-Amerika,  by  A. 
Streng  and  J.  H.  Kloos.  Leonhard's  Jahrbuch,  1877,  pp.  31,  113,  225.  Trans- 
lated by  N.  II.  Winchell  in  Eleventh  Ann.  Rept.  Geol.  and  Nat.  Hist.  Survey 
Minnesota,  for  1SS2,  pp.  30-S5. 
140  Sixth  Ann.  Rept.  Geol.  and  Nat.  Hist.  Survey  Minnesota,  for  1877,  by  N. 
H.  Winchell,  pp.  226. 
141  Sketch  of  the  work  of  the  season  of  1878,  by  N.  H.  Winchell.  Seventh  Ann. 
Rept.  Geol.  and  Nat.  Hist.  Survey  Minnesota,  for  1S78,  pp.  9-25. 
142  The  cupriferous  series  at  Duluth,  by  N.  H.  Winchell.  Eighth  Ann.  Rept. 
Geol.  and  Nat.  Hist.  Survey  Minnesota,  for  1879,  pp.  22-26. 
143  Preliminary  report  on  the  geology  of  central  and  western  Minnesota,  by 
Warren  Upham.     Idem,  pp.  70-125. 
144  Report  of  Prof.  C.  W.  Hall.     Idem,  pp.  126-138. 
145  Preliminary  list  of  rocks,  by  N.  II.  Winchell.  Ninth  Ann.  Rept.  Geol.  and 
Nat.  Hist.  Survey  Minnesota,  for  1880,  pp.  10-114. 
140  The  cupriferous  series  in  Minnesota,  by  N.  II.  Winchell.  Proc.  Am.  Assoc. 
Adv.  Sci.,  29th  meeing,  1881,  pp.  422-425.  See  also  Ninth  Ann.  Rept.  Geol. 
and  Nat.  Hist.  Survey  Minnesota,  for  1880,  pp.  3S5-3S7. 
147  Preliminary  list  of  rocks,  by  N.  II.  Winchell.  Tenth  Ann.  Rept.  Geol.  and 
Nat.  Hist.  Survey  Minnesota,  for  1881,  pp.  9-122. 
148  Notes  on  rock  outcrops  in  central  Minnesota,  by  Warren  Upham.  Eleventh 
Ann.  Rept.  Geol.  and  Nat.  Hist.  Survey  Minnesota,  for  1882,  pp.  86-136. 
149  The  iron  region  of  northern  Minnesota,  by  Albert  II.  Chester.  Idem.  pp. 
154-167. 
150  Note  on  the  age  of  the  rocks  of  the  Mesabi  and  Vermilion  iron  district,  by 
N.  H.  Winchell.  Idem,  168-170.  See  also  Proc.  Am.  Assoc.  Adv.  Sci.,  1884,  33d 
meeting,  pp.  363-371). 
151  The  geology  of  Minnesota,  by  N.  II.  Winchell  and  Warren  Upham.  Vols. 
1  and  2  of  the  Final  Report,  pp.  697,  695. 
152  Notes  of  a  trip  across  the  Mesabi  range  to  Vermilion  Lake  by  X.  II. 
Winchell.  Thirteenth  Ann.  Rept.  Geol.  and  Nat.  Hist.  Survey  Minnesota,  for 
1884,  pp.  20-24.  The  crystalline  rocks  of  Minnesota,  by  N.  II.  Winchell.  [dem, 
pp.  36-38. 
153  The  crystalline  rocks  of  the  Northwest,  by  N.  II.  Winchell.  Idem.  pp. 
124-140. 
164  Report  of  a  trip  on  the  upper  Mississippi  and  to  Vermilion  Lake,  by  Bailey 
Willis.     Tenth  Census,  vol.  15,  18S6,  pp.  457-167. 
