714  PRE-CAMBRTAN    GEOLOGY   OF    NORTH    AMERICA. 
45  On  the  geology,  mineralogy,  scenery,  and  curiosities  of  parts  of  Virginia, 
Tennessee,  and  the  Alabama  and  Mississippi  Territories,  etc.,  with  miscellaneous 
remarks,  by  Rev.  Elias  Cornelius.  Am.  Jour.  Sci.,  1st  ser.,  vol.  1,  1818,  pp.  214- 
226,  317-331. 
46  Report  of  the  progress  of  the  geological  survey  of  the  State  of  Virginia  for 
the  year  1839,  by  William  B.  Rogers.  Richmond,  1840,  pp.  161.  See  also  Pre- 
liminary report  (Virginia)   for  1835  and  annual  reports  for  1836,  1837,  1838. 
47  Report  of  the  progress  of  the  geological  survey  of  Virginia  for  the  year 
1840,  by  William  B.  Rogers,  Richmond,  1841,  pp.  132. 
48  On  some  points  in  the  geology  of  the  Blue  Ridge  in  Virginia,  by  William  M. 
Fontaine.    Am.  Jour.  Sci.,  3d  ser.,  vol.  9,  1875,  pp.  14-22,  93-101. 
49  On  the  primordial  strata  of  Virginia,  by  William  M.  Fontaine.  Idem,  vol. 
9,  1875,  pp.  361-369,  416-128. 
50  Geology  of  Virginia — Balcony  Falls ;  the  Blue  Ridge  and  its  geological  con- 
nections; some  theoretical  considerations,  by  J.  L.  Campbell.  Idem,  vol.  18, 
1879,  pp.  435-445.  See  also  The  Silurian  formation  in  central  Virginia.  The 
Virginias,  vol.  1,  1880,  pp.  41-45,  54-56;  Am.  Jour.  Sci.,  3d  ser.,  vol.  18,  1879, 
pp.  16-29. 
51  The  mineral  resources  and  advantages  of  the  country  adjacent  to  the  James 
River  and  Kanawha  Canal  and  the  Buchanan  and  Clifton  Forge  Railway,  by 
J.  L.  Campbell.    The  Virginias,  vol.  1,  1880,  pp.  2-8,  with  map. 
52  The  geology  of  the  Blue  Ridge,  etc.,  at  James  River  Gap,  Virginia,  by  J.  L. 
Campbell.     Idem,  pp.  86-87,  94. 
03  Notes  on  the  mineral  deposits, at  certain  localities  on  the  western  part  of 
the  Blue  Ridge,  by  William  M.  Fontaine.  Idem,  vol.  4,  1883,  pp.  21-22,  42-47, 
55-59,  73-76,  92-93. 
54A  reprint  of  annual  reports  and  other  papers  on  the  geology  of  the  Vir- 
ginias, by  William  Barton  Rogers,  1884,  pp.  832,  with  maps  and  sections. 
55  The  Snowdon  slate  quarries,  by  J.  L.  and  H.  D.  Campbell.  The  Virginias, 
vol.  5,  1884,  pp.  162-163,  170.  See  also  Geology  of  the  Blue  Ridge  in  James 
River  Gap,  Virginia,  by  J.  L.  Campbell.  Idem,  p.  145.  Geology  of  the  Blue 
Ridge  near  Balcony  Falls,  Virginia ;  a  modified  view,  by  John  L.  Campbell. 
Am.  Jour.  Sci.,  3d  ser.,  vol.  28,  1884,  pp.  221-223. 
50  The  structure  of  the  Blue  Ridge  near  Harpers  Ferry,  by  H.  R.  Geiger  and 
Arthur  Keith.     Bull.  Geol.  Soc.  America,  vol.  2,  1891,  pp.  155-164. 
57  Fossils  in  the  "  Archean  "  rocks  of  central  Piedmont  Virginia,  by  N.  H. 
Darton.    Am.  Jour.  Sci.,  3d  ser.,  vol.  44,  1892,  pp.  50-52. 
58  Copper-bearing  rocks  of  Virgilina  copper  district,  Virginia  and  North  Caro- 
lina, by  T.  L.  Watson.     Bull.  Geol.  Soc.  America,  vol.  13,  1902,  pp.  353-376. 
59  Memoir  on  the  geological  survey  of  the  State  of  Delaware,  including  the 
application  of  the  geological  observations  to  agriculture,  by  James  C.  Booth. 
Dover,  1841,  pp.  188. 
ec  Preliminary  notes  on  the  geology  of  Delaware — Laurentian,  Paleozoic,  and 
Cretaceous  areas,  by  Frederick  D.  Chester.  Proc.  Philadelphia  Acad.  Sci., 
1884,  pp.  237-259,  with  a  map. 
61  The  gabbros  and  associated  rocks  in  Delaware,  by  Frederick  D.  Chester. 
Bull.  U.  S.  Geol.  Survey  No.  59,  1890,  pp.  45. 
62  Report  on  the  geology  of  North  Carolina,  conducted  under  the  direction  of 
the  Board  of  Agriculture,  by  Denison  Olmsted,  1824,  pt.  1,  pp.  3-44. 
03  Report  on  the  geology  of  North  Carolina,  by  Denison  Olmsted.  Papers  on 
agricultural  subjects,  conducted  under  the  direction  of  the  Board  of  Agri- 
culture, pt.  2,  Raleigh,  1825,  pp.  87-141. 
64  On  the  geology  of  the  gold  region  of  North  Carolina,  by  Elisha  Mitchell. 
Am.  Jour.  Sci.,  1st  ser.,  vol.  16,  1829.  pp.  1-19,  with  a  map. 
