FOR   THE    YEARS    1901-1905,   INCLUSIVE.  373 
Wilson  (Herbert  M.). 
1.  Porto  Rico;  its  topography  and  aspects. 
Am.  Geog.  Soc,  Bull.,  vol.  32,  pp.  220-238,  with  map,  1900. 
Describes  physiography  of  the  island. 
Wilson  (J.  Howard). 
1.  The  Pleistocene  formations  of  Sankaty  Head,  Nantucket. 
Jour.  Geol.,  vol.  13,  pp.  713-734,  12  figs.,  1905. 
Describes  the  position  and  character  of  the  successive  beds  in  a  section  at  this  point,  gives  a 
tabulated  list  of  the  fossils  obtained,  with  notes  on  their  occurrence  elsewhere,  and  dis- 
cusses the  conditions  under  which  the  beds  were  formed. 
Wilson  (John  D.). 
1.  Fauna  of  the  Agoniatite  limestone  of  Onondaga  County,  N.  Y. 
Onondaga  Acad.  ScL,  Proa,  vol.  1,  pp.  84-88,  1903. 
Describes  the  occurrence,  character,  and  fossils  of  the  Agoniatite  limestone  of  the  Marcellus 
shale  in  Onondaga  County,  N.  Y. 
Wilson  (W.  J.). 
1.  Western  part  of  the  Abitibi  region  [Canada]. 
Can.  Geol.  Surv.,  Summ.  Rept.  for  1901,  pp.  115-128,  1902. 
Describes  the  author's  observations  in  this  region. 
2.  Reconnaissance  surveys  of  Four  Rivers  southwest  of  James  Bay. 
Can.  Geol.  Surv.,  Summ.  Rept.  for  1902,  pp.  220-239,  1903. 
Contains  observations  upon  the  geology  of  the  region  examined. 
3.  The  Nagagami  River  and  other  branches  of  the  Kenogami. 
Can.  Geol.  Surv.,  Summ.  Rept.  for  1903,  pp.  109-120,  1904. 
Gives  notes  upon  the  geology  of  the  region  examined. 
4.  The  Little  Current  and  Drowning  rivers,  branches  of  the  Albany,  east  of  Lake 
Nipigon  [Ontario]. 
Can.  Geol.  Surv.,  Summ.  Rept.  for  1904,  pp.  164-173,  1905. 
Includes  observations  on  the  geology  of  the  region  examined. 
Winchell  (Alexander  N.). 
1.  Etude  mineralogique  et  petrographique  des  roches  gabbroi'ques  de  l'Etat  de  Min- 
nesota, Etats-Unis,  et  plus  specialement  des  anorthosites. 
Paris,  1900.    164  pp.,  9  pis.,  23  rigs.     Abstract:  Am.  Jour.  Sci.,  4th  ser.,  vol.  11,  p.  89,  1901. 
2.  Note  on  certain  copper  minerals. 
Am.  Geol.,  vol.  28,  pp.  244-246,  1901. 
Describes  occurrence  of  chalcopyrite  and  bornite  at  Butte,  Mont. 
3.  Note  on  titaniferous  pyroxene. 
Am.  Geol.,  vol.  31,  pp.  309-310,  1903. 
Discusses  composition  and  optic  angle. 
4.  [Discussion  of  paper  by  J.  E.  Spurr,  "A  consideration  of  igneous  rocks  and  their 
segregation  or  differentiation  as  related  to  the  occurrence  of  ores."] 
Am.  Inst.  Mg.  Engrs.,  Trans.,  vol.  33,  pp.  1063-1064,  1903. 
Discusses  an  example  of  ore  concentration  in  Madison  County,  Montana. 
Winchell  (Horace  V.). 
1.  The  ore  deposits  of  Monte  Cristo,  Washington. 
Am.  Geol.,  vol.  30,  pp.  113-118,  1902. 
Reviews  a  paper  by  J.  E.  Spurr. 
2.  Synthesis  of  chalcocite  and  its  genesis  at  Butte,  Montana. 
Geol.  Soc.  Am.,  Bull.,  vol.  14,  pp.  269-276,  1903;  Eng.  &  Mg.  Jour.,  vol.  75,  pp.  782-784,  1903. 
Discusses  occurrence  and  experiments  to  determine  origin  of  chalcocite. 
3.  The  Mesabi  iron  range  [Minnesota]. 
Eng.  &  Mg.  Jour.,  vol.  76,  pp.  343-344,  1903. 
Discusses  geologic  work  upon  the  Mesabi  iron  range. 
