FOR    THE    YEARS    1901-1905,   INCLUSIVE.  215 
Lang-ley  (S.  P.). 
1.  Powell  as  a  man. 
Wash.  Acad.  Sei.,  Proa,  vol.  5,  pp.  127-130,  1903. 
2.  The  greatest  flying  creature. 
Sci.  Am.  Suppl.,  vol.  55,  pp.  22644-22645,  illus.,  1903. 
Discusses  flight  in  the  Ornithostoma,  introducing  a  paper  by  F.  A.  Lucas  with  the  same  title. 
Lang-worthy  (A.  E.  ). 
1.  The  Atchison  [Kansas]  diamond-drill  prospect  hole. 
Kan*.  Acad.  Sci.,  Trans.,  vol.  17,  pp.  45-52,  1901. 
Gives  record  of  boring,  discusses  strata  penetrated,  and  includes  analyses  of  coal. 
Lasswitz  (Rudolf). 
L.  Die  Kreide-Ammoniten  von  Texas.     (Collectio  F.  Roemer.) 
Geol.  und  Pal.  Abh.  (Koken),  N.  F.,  Bd.  6,  Heft  4,  40  pp.,  8  pis.,  1901. 
Gives  systematic  descriptions  of  Cretaceous  ammonites  from  Texas,  a  graphic  section  of  strata 
at  Austin,  and  correlation  tables  of  Cretaceous  formations. 
Launay  (L.  de). 
1.    [Discussion  of  "The  origin  of  ore-deposits."] 
Am.  Inst.  Mg.  Engrs.,  Trans.,  vol.  31,  pp.  947-951,  1902. 
Lawson  (Andrew  C. ). 
1.    A  feldspar-corundum  rock  from  Plumas  County,  California. 
Abstract:  Jour.  Geol.,  vol.  9,  p.  78,  1901;  Geol.  Soc.  Am.,  Hull.,  vol.  12,  pp.  501-502,  1901. 
Gives  chemical  analysis  of  the  feldspar. 
L\  The  drainage  features  of  California. 
Abstract:  Jour.  Geol.,  vol.  9,  pp.  77-78,  1901;  Geol.  Soc.  Am.,  Bull.,  vol.  12,  p.  495,  1901. 
Discusses  the  causes  which  have  determined  the  drainage  features  of  the  Coast,  Klamath, 
and  Sierra  Nevada  ranges. 
3.  Joseph  Le  Conte. 
Science,  new  sei.,  vol.  14,  pp.  273-277,  1  pi.,  1901. 
Gives  a  sketch  of  his  life  and  work. 
4.  The  Eparchsean  interval:  a  criticism  of  the  use  of  the  term  Algonkian. 
Univ.  Cal.,  Dept.  Geol.,  Bull.,  vol.  3,  pp.  51-62,  1902. 
Discusses  the  application  of  the  terms  Archsean  and  Algonkian,  the  correlation  of  their  for- 
mations and  defines  the  term  Eparchtean  interval. 
5.  Third  annual   meeting  of  the  Cordilleran  section  of   the  Geological   Society  of 
America  [Proceedings  and  abstracts  of  papers]. 
Science,  new  ser.,  vol.  15,  pp.  410-417,  1902. 
(>.   A  geological  section  of  the  middle  Coast  ranges  of  California. 
Abstract:  Science,  new  ser.,  vol.  15,  p.  415,  1902. 
Gives  a  table  showing  succession  and  character  of  geologic  formations  in  the  Coast  ranges  in 
the  vicinity  of  the  Bay  of  San  Francisco. 
7.  <  )n  an  orbicular  gabbro  from  San  Diego  County ;  California. 
Abstract:  Science,  new  ser.,  vol.  15,  p.  415,  1902. 
8.  Plumasite,  an  oligoclase-corundum  rock. 
Cal.  Univ.,  Dept.  Geol.,  Bull.,  vol.  3,  pp.  219-229,  1903. 
Discusses  occurrence  of  corundiferous  rocks,  and  describes  the  occurrence  and  characters  oi 
this  corundum  rock  discovered  on  Spanish  Peak  in  Plumas  County,  California. 
9.  Geological  section  of  the  middle  Coast  ranges  of  California. 
Abstract:  Geol.  Soc.  Am.,  Bull.,  vol.  13,  pp.  544-545,  1903. 
In  a  table  gives  the  names  of  the  formations  and  their  lithologic  characters  and  thickness. 
10.  The  geomorphogeny  of  the  upper  Kern  basin_ 
Cal.  Univ.,  Dept.  Geol.,  Bull.,  vol.  3,  pp.  291-376,  15  pis.,  1904. 
Describes  the  occurrence  and  general  petrographic  characters  of  the  rocks  and  the  glaciation 
and  physiographic  features  of  the  region,  and  discussess  the  origin  of  the  latter. 
