436  PRE-CAMBR1AN    ROCKS    OF    NORTH    AMERICA.  [bull.  86. 
144  Geological  Studies  of  the  Archean  Rooks,  Frank  L.  Nason.  Ann.  Rept.  of  the 
State  Geologist  of  New  Jersey  for  the  year  1889,  pp.  12-65. 
us  'phe  Post-Archean  Age  of  the  White  Limestones  of  Sussex  County,  New  Jersey, 
Frank  L.  Nason.  Ann.  Rept.  of  the  State  Geologist  for  the  year  1890^  pp.  25-50,  with 
a  map  and  sections.     See  also  Am.  Geol.,  vol.  viii,  1891,  pp.  166-171. 
146  A  Sketch  of  the  Geology  of  the  Country  near  Easton,  Pa.,  with  a  catalogue  of  the 
minerals  and  a  map,  John  Finch.     Am.  Jour.  Sci.,  1st  ser.,  vol.  viii,  1824,  pp.  236-240. 
147  On  the  Geology  and  Mineralogy  of  the  country  near  West  Chester,  Pa.,  F.  Finch. 
Ibid.,  vol.  xiv,  1828,  pp.  15-18. 
148 The  Geology  of  Pennsylvania,  Henry  Darwin  Rogers;  2  vols.,  586  pp.  and  1046 
pp.,  atlas  of  two  maps,  Philadelphia,  1858.  See  also,  hy  the  same  author,  Third 
Annual  Report  of  the  Geological  Survey  of  the  State  of  Pennsylvania,  Harrisburg, 
1839,  pp.  118.  Fourth  Annual  Report  on  the  Geological  Survey  of  the  State  of  Penn- 
sylvania, Harrisburg,  1840,  pp.  252.  Fifth  Annual  Report  on  the  Geological  Explora- 
tion of  Pennsylvania,  Harrisburg,  1841,  pp.  179.  Classification  of  the  Metamorphic 
Strata  of  the  Atlantic  Slope  of  the  Middle  and  Southern  States.  Proc.  Bost.  Soc.  Nat. 
Hist.,  vol.  vi,  pp,  140-145. 
149  Bowlders  of  Hornblendie  Rock  in  Gneiss  near  Philadelphia,  A.  R.  Leeds.  Proc. 
Philadelphia  Acad.  Sci.,  vol.  xxn,  pp.  134-135. 
150  Report  of  Progress  in  the  District  of  York  and  Adams  Counties,  Persifor  Frazer, 
jr.  Second  Geological  Survey  of  Pennsylvania,  vol.  C,  pp.  198,  with  maps  and  cross- 
sections. 
1,1  Report  of  Progress  in  the  Counties  of  York,  Adams,  Cumberland,  and  Franklin, 
Persifor  Frazer,  jr.     Ibid.,  vol.  CC,  pp.  201-400,  with  maps  and  cross-sections. 
153  Geology  of  Eastern  Pennsylvania,  T.  Sterry  Hunt.  Proc.  Ain.  Assoc.  Adv.  Sci., 
25th  meeting,  pp.  208-212. 
ir,3The  Brown  Hematite  Deposits  of  Lehigh  County,  Frederick  Prime,  jr.  Second 
Geological  Survey  of  Pennsylvania,  vol.  DD,  pp.  99,  with  two  maps. 
154  The  Geology  of  Lancaster  County,  Persifor  Frazer,  jr.  Ibid.,  vol.  CCC,  pp.  350, 
with  an  atlas  of  11  plates  and  maps. 
155  On  the  Hudson  River  age  of  the  Peach  Bottom  Slates  and  its  bearing  on  the 
Geology  of  Southeastern  Pennsylvania,  Persifor  Frazer,  jr.  Proc.  Am.  Phil.  Soc,  vol. 
xviii,  pp.  366-368. 
'"'The  Geology  of  Philadelphia  County  and  of  the  southern  parts  of  Montgomery 
and  Bucks,  Charles  E.  Hall.  Second  Geological  Survey  of  Pennsylvania,  vol.  C6,  pp. 
145,  with  map  and  plate. 
157 The  Geology  of  Lehigh  and  Northampton  Counties,  J.  P.  Lesley.  Ibid.,  vol.  D3; 
vol.  i,  pp.  1-82,  2  maps. 
158 Itinerary  note  on  the  South  Mountain  Gneiss,  Charles  E.  Hall.  Ibid.,  vol.  D3; 
vol.i,  pp.  215-258. 
159The  Geology  of  South  Mountain  belt  of  Berks  County,  E.  V.  d'lnvilliers.  Ibid., 
vol.  D3 ;  vol.  ii,  p.  441,  with  6  maps. 
11  "Field  Notes  in  Delaware  County,  Charles  E.  Hall.  Ibid.,  vol.  C5,  part  1,  pp.  128, 
with  a  colored  map. 
161 A  Study  of  one  point  in  the  Archean-Paleozoic  contact  line  in  Southeastern  Penn- 
sylvania, Persifor  Frazer.  Proc.  Am.  Assoc.  Adv.  Sci.,  1884,  33d  meeting,  pp.  394-396, 
with  map. 
162  General  Notes.  Sketch  on  the  Geology  of  York  County,  Pennsylvania,  Persifor 
Frazer.     Proc.  Am.  Phil.  Soc,  vol.  xxiii,  pp.  391-410,  with  a  map. 
163  A  Discussion  on  the  Rocks  of  Pennsylvania  and  New  York,  Theodore  D.  Rand. 
Trans.  N.  Y.  Acad.  Sci.,  vol.  viii,  pp.  47-51. 
164 Report  on  the  Projected  Survey  of  the  State  of  Maryland,  J.  T.  Ducatel  and  J. 
H.  Alexander.  Annapolis,  1834,  pp.  39.  See  also  Am.  Jour.  Sci.,  1st  ser.,  vol.  xx  vn,  pp. 
1-38. 
of  the  Country  between  Baltimore  and  the  Ohio 
