FOR    THE    YEARS    L901-1905,    INCLUSIVE.  219 
Leith  (C.  K),  Van  Hise  (C.  R.)  and 
1 .  The  Mesabi  district, 
See  Van  Hise  (C.  R.),  2. 
Leonard  (Arthur  Gray). 
1.  The  basic  rocks  of  northwestern  Maryland  and  their  relation  to  the  granite. 
Am.  Geol.,  vol.  28,  pp.  135-176.  5  pis..  1901. 
Describes  the  geologic  occurrence  and  relations  and  discusses  the  origin  of  the  various  facies. 
2.  Report  of  assistant  State  geologist  [Iowa]. 
Iowa  Geol.  Surv.,  vol  12,  Ann.  Rept.  for  1901,  pp.  28-32,  1902. 
Gives  record  of  a  boring  at  Clarinda,  Iowa. 
3.  Geology  of  Wapello  County  [Iowa]. 
h.wa  Geol.  Surv.,  vol.  12,  Ann.  Rept.  for  1901,  pp.  441-499,  1  pi.,  15  figs.,  geol.  map,  1902. 
Describes    physiographic    features,   geologic  structure,   and   occurrence  and    utilization   of 
economic  products.  « 
4.  Topographic  features  and  geological  formations  of  North  Dakota. 
N.  Dak.  Geol.  Surv.,  3d  Biennial  Report,  pp.  127-177,  (i  pis.,  1904. 
Lerch  (Otto). 
1.  A  preliminary  report  upon  the  hills  of  Louisiana,  north  of  the  Vicksburg,  Shreve- 
port  and  Pacific  Railroad. 
La.  State  Experiment  Stations;  Geol.  &  Agric,  pt.  1.  pp.  1  52,  6  figs.,  2  pis.  [1892?]. 
Describes  topography,  drainage,  and  geology  of  the  area  and  discusses  its  economic  resources. 
2.  A  preliminary  report  upon  the  hills  of  Louisiana,  south  of  the  Vicksburg,  Shreve- 
port  and  Pacific  Railroad,  to  Alexandria,  Louisiana. 
La.  State  Experiment  Stations;  (ieol.  A  Agric.  pt.  2,  pp.  53-158,  26  figs.,  2  pis.  (sections)  [1893?]. 
Describes  topography,  drainage,  and  geology  of  the  area  and  discusses  its  economic  resources. 
LeRoy  (Osmond  Edgar). 
1.  Geology  of  Rigaud  Mountain,  Canada. 
Geol.  Sue.  Am.,  Bull.,  vol.12,  pp.  377-394, pis. 33-34,  1901;  McGill  Univ.  Papers  from  Dept.Geol. 
no.  13,  1902. 
Describes  the  topographic  and  general  geologic  features  of  the  region  and  the  microscopic 
characters  of  the  igneous  rocks. 
LeRoy  (Osmond  E.),  Adams  (F.  D. )  and. 
1.  The  artesian  and  other  deep  wells  on  the  Island  of  Montreal. 
See  Adams  (F.  D.)  and  LeRoy  (O.  E.),  1. 
Letson  ( Elizabeth  J . ) . 
1.  Post-Pliocene  fossils  of  the  Niagara  River  gravels. 
Buffalo  Soc.  Nat,  Sci..  Bull.,  vol.  7,  pp.  '238-252,  30  figs.,  1901;  N.  Y.  State  Mus.,  54th  Ann.  Kept., 
vol.  4, 1902. 
Leverett  (Frank). 
1.  Soils  of  Illinois. 
111.  Bd.  of  World's  Fair  Commissioners,  Rept.,  pp.  77-92,  1  pi.,  1895. 
2.  Old  channels  of  the  Mississippi  in  southeastern  Iowa. 
Annals  of  Iowa,  3d  ser.,  vol.  5,  pp.  38-51,  1901. 
Describes  the  extent  and  history  of  the  glaciation.  the  old  drainage  of  the  upper  Mississippi, 
and  the  changes  produced  by  the  glaciation. 
3.  Report  on  the  surface  geology  of  Alcona  County,  Michigan. 
Mich.  Geol.  Surv.,  Ann.  Rept.  for  1901,  pp.  35-64,  2  pis.,  geol.  map,  1902. 
Describes  the  physiography,  glacial  deposits  and  lake  history,  and  the  occurrence  of  marl, 
clay,  and  water  powers. 
4.  Glacial  formations  and  drainage  features  of  the  Erie  and  Ohio  basins. 
U.  S.  Geol.  Surv.,  Mon.,  vol.  41,  802  pp.,  26  pis.,  8  tigs.,  1902. 
Describes  physical  features,  present  and  former  drainage,  character,  and  occurrence  of  drift 
deposits  and  the  glacial  history  of  the  region. 
5.  Summary  of  the  literature  of  North  American  Pleistocene  geology,  1901  and  1902. 
Jour.  Geol.,  vol.  11,  pp.  420-428,  498-515,  587-611,  1903. 
