104  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Dresser  (John  A.)— Continued. 
2.  A  hornblende  lamprophyre  dike  at  Richmond,  P.  Q. 
Can.  Rec.  Sci.,  vol.  8,  pp.  315-320,  1901. 
Describes  the  occurrence  of  the  dike  and  the  characters  of  the  dike  rock. 
3.  A  preliminary  note  on  an  amygdaloidal  trap  rock  in  the  eastern  townships  of  the 
Province  of  Quebec- 
Ottawa  Nat.,  vol.  14,  pp.  180-182,  1901. 
Describes  the  megascopic  and  microscopic  characters  of  the  rock. 
4.  On  the  petrography  of  Mt.  Orford. 
Am.  Geol.,  vol.  27,  pp.  14-21,  1901. 
Describes  occurrence  and  character  of  diabase,  gabbro-diorite,  serpentine,  and  ophicalcite, 
and  gives  a  summary  of  the  geologic  history  of  the  region. 
5.  On  the  petrography  of  Shefford  Mountain  [Quebec]. 
Am.  Geol.,  vol.  28,  pp.  204-213,  1  pi.,  1901. 
Describes  petrographic  characters  of  essexite,  nordmarkite,  and  pulaskite,  and  discusses  their 
relations. 
6.  A  petrographical  contribution   to  the  geology  of   the  eastern  townships  of  the 
Province  of  Quebec. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  14,  pp.  43-48,  1902. 
Describes  the  pre-Cambrian  igneous  rocks  that  are  regarded  as  similar  to  the  volcanics  of 
South  Mountain,  Pa. 
7.  On  the  copper-bearing  volcanic  rocks  in  the  eastern  townships  of  the  Province  of 
Quebec. 
Can.  Mg.  Inst.,  Jour.,  vol.  5,  pp.  81-86,  1902;  Eng.  &  Mg.  Jour.,  vol.  73,  p.  412,  3  figs.,  1902. 
8.  Petrography  of  Shefford  and  Brome  Mountains  [Canada]. 
Can.  Geol.  Surv.,  Summ.  Rept.  for  1901,  pp.  183-187,  1902. 
Describes  petrologie  and  other  observations. 
9.  Report  on  the  geology  and  petrography  of  Shefford  Mountain,  Quebec. 
Can.  Geol.  Surv.,  Ann.  Rept.,  new  ser.,  vol.  13,  35  pp.,  6  pis.,  1  fig.  and  1  map,  1903.     (Published 
separately,  1902.) 
Describes  the  geology,  and  the  occurrence,  relations,  and  composition  of  the  igneous  rocks. 
10.  An  investigation  of  the  copper-bearing  rocks  of  the  eastern  townships,  Province 
of  Quebec. 
Can.  Geol.  Surv.,  Summ.  Rept.  for  1902,  pp.  302-316,  1903. 
Discusses  the  occurrence,  geologic  position,  and  character  of  copper-ore  deposits. 
11.  Geology  of  Brome  Mountain,  one  of  the  Monteregian  Hills. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  17,  pp.  347-358,  2  figs.,  1904. 
Describes  the  position  and  physiographic  origin  of  the  Monteregian  Hills,  and  in  detail  the 
petrography  of  Brome  Mountain. 
12.  A  new  area  of  copper-bearing  rocks  in  the  eastern  townships  of  the  Province  of 
Quebec. 
Can.  Mg.  Rev.,  vol.  23,  p.  29,  1904;  Can.  Mg.  Inst.,  Jour.,  vol.  7,  pp.  397-400,  1904. 
Describes  the  occurrence  and  geologic  relations. 
13.  The  copper-bearing  rocks  of  the  eastern  townships,  Quebec. 
Can.  Geol.  Surv.,  Summ.  Rept.  for  1903,  pp.  146-149,  1904. 
Describes  investigations  upon  copper-producing  areas  in  Quebec. 
14.  The  bed-rock  of  the  Gilbert  River  gold  fields,  Quebec. 
Can.  Mg.  Rev.,  vol.  21,  p.  71,  1905.     Can.  Mg.  Inst.  Jour.,  vol.  8,  pp.  259-266,  1905. 
Discusses  the  source  of  the  placer  gold  of  this  region. 
15.  The  copper-bearing  rocks  of  the  Sherbrooke  district,  P.  Q. 
Can.  Geol   Surv.,  Summ.  Rept.  for  1904,  pp.  263-269,  1905. 
Includes  observations  on  the  geology  of  the  region,  and  the  occurrence  of  minerals  of  eco- 
nomic importance. 
16.  A  note  on  varieties  of  serpentine  in  south-eastern  Quebec. 
Can.  Mg.  Inst.,  Jour.,  vol.  8,  pp.  267-271,  1905. 
