INCLUSIVE.  37 
Beyer  (S.  W.) — Continued. 
2.  Iowa's  iron  mine. 
Eng.  &  Mg.  Jour.,  vol.  73,  pp.  275-276,  2  figs.,  1902. 
Describes  the  occurrence,  character,  and  origin  of  the  ore. 
3.  Mineral  production  of  Iowa  in  1902. 
Iowa  Geo].  Surv.,  vol.  14,  Ann.  Rept,  1903,  pp.  7-26,  1904. 
4.  Mineral  production  in  Iowa  in  1904. 
Iowa  Geol.  Surv.,  vol.  15,  Ann.  Rept.,  1904,  pp.  15-32,  1905. 
Beyer  (S.  W.)  and  Williams  (LA.). 
1.  Technology  of  clays. 
Iowa  Geol.  Surv.,  vol.  14,  pp.  29-318,  7  pis.,  30  figs.,  1904. 
Discusses  the  classification,  origin,  and  properties  of  clays,  and  manufacture  of  clay  wares. 
2.  The  geology  of  clays. 
Iowa  Geol.  Surv.,  vol.  14,  pp.  377-554,  22  pis.,  41  figs.,  1904. 
Describes  in  detail  the  occurrence,  by  counties,  of  clays  in  Iowa,  and  their  geologic  horizons. 
Beyer  (S.  W.)  and  Young  (L.  E.). 
1.  Geology  of  Monroe  County  [Iowa]. 
Iowa  Geol.  Surv.,  vol.  13,  pp.  355-422,  2  pis.,  20  figs.,  1903. 
Describes  topography  and  drainage,  the  character,  occurrence,  and  geologic  relations  of 
Carboniferous  strata  and  glacial  deposits,  the  character  and  occurrence  of  coal  seams,  coal- 
mining operations  in  the  county,  and  other  economic  resources. 
Bibbins  (Arthur  B. ). 
1.  Occurrence  of  zoisite  and  thulite  near  Baltimore  [Maryland]. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  11,  pp.  171-172,  1901. 
From  notes  by  the  late  John  W.  Lee. 
2.  Stratigraphical  position  and  general  nature  of  the  Maryland  cycads. 
U.  S.  Geol.  Surv.,  Mon.,  vol.  48,  pp.  411-416,  1905.    . 
3.  The  buried  cypress  forests  of  the  upper  Chesapeake. 
Records  of  the  Past,  vol.  4,  pp.  47-53,  3  figs.,  1905. 
Bibbins  (Arthur  B.),  Clark  (William  B.)  and. 
1.  Geology  of  the  Potomac  group  in  the  middle  Atlantic  slope. 
See  Clark  (W.  B.)  and  Bibbins  (A.  B.),  1. 
Biddle  (H.  C). 
1.  The  deposition  of  copper  by  solutions  of  ferrous  salts. 
Jour.  Geol.,  vol.  9,  pp.  430-436,  1901. 
Describes  certain  chemical  experiments  which  show  that  the  conditions  under  which  the 
oxidation  of  the  ferrous  salts  may  result  in  the  deposition  of  copper  are  those  which  are 
found  in  the  circulation  of  underground  water. 
Bilgram,  Hugo. 
1.  Inclusions  in  quartz. 
Phila.  Acad.  Nat.  Sci.,  vol.  55,  p.  700,  1904. 
Billups  (A.  C). 
1.  Fossil  land  shells  of  the  old  forest  bed  of  the  Ohio  Eiver. 
Nautilus,  vol.  16,  pp.  50-52,  1902. 
Describes  the  occurrence  and  gives  a  list  of  and  notes  upon  the  species  identified. 
Birge  (E.  A.). 
1.  Report  of  the  superintendent  of  the  survey. 
Wis.  Geol.  &  Nat.  Hist.  Surv.,  1st  Bienn.  Rept.  of  the  Commissioners,  pp.  8-28, 1898. 
Chiefly  administrative,  but  contains  notes  on  the  geology  of  Wisconsin. 
2.  Report  of  the  superintendent  of  the  survey. 
Wis.  Geol.  &  Nat.  Hist.  Surv.,  2d  Bienn.  Rept.  of  the  Commissioners,  pp.  7-36,  1901. 
Chiefly  administrative,  but  contains  notes  on  the  geology  of  Wisconsin. 
3.  Report  of  the  superintendent  of  the  survey. 
Wis.  Geol.  &  Nat.  Hist,  Surv.,  3d  Bienn.  Rept.  of  the  Commissioners,  pp.  9-27,  1902. 
Chiefly  administrative,  but  contains  notes  on  the  geology  of  Wisconsin. 
