﻿Luquer 
  and 
  Yolckening 
  — 
  New 
  Analyses 
  of 
  Sodalite. 
  465 
  

  

  no 
  such 
  uniform 
  cutting 
  out 
  of 
  wide 
  valleys 
  would 
  have 
  been 
  

   possible. 
  It 
  was 
  no 
  doubt 
  at 
  this 
  time 
  also 
  that 
  much 
  of 
  the 
  

   denudation 
  of 
  the 
  Great 
  Plains 
  to 
  the 
  eastward 
  occurred. 
  In 
  

   the 
  vicinity 
  of 
  the 
  western 
  end 
  of 
  the 
  Cypress 
  Hills 
  the 
  general 
  

   surface 
  of 
  the 
  plain 
  is 
  now 
  about 
  2200 
  feet 
  lower 
  than 
  the 
  

   Miocene 
  capping 
  of 
  these 
  hills. 
  

  

  Art. 
  XLI. 
  — 
  On 
  Three 
  New 
  Analyses 
  of 
  Sodalite, 
  from 
  three 
  

   new 
  localities 
  ; 
  by 
  L. 
  Mel. 
  Luquer 
  and 
  G-. 
  J. 
  Yolckening-. 
  

  

  Sodalite 
  from 
  Hastings 
  Co., 
  Prov. 
  Ontario, 
  Canada. 
  

  

  The 
  massive 
  sodalite 
  from 
  this 
  locality 
  was 
  collected 
  by 
  

   Mr. 
  T. 
  D. 
  Ledyard 
  of 
  Toronto. 
  It 
  was 
  found 
  in 
  the 
  northern 
  

   part 
  of 
  Hastings 
  County, 
  Prov. 
  Ontario, 
  about 
  180 
  miles 
  N.E. 
  

   of 
  Toronto. 
  According 
  to 
  Mr. 
  Ledyard's 
  statement 
  the 
  soda- 
  

   lite 
  does 
  not 
  appear 
  to 
  be 
  very 
  plentiful, 
  takes 
  a 
  beautiful 
  

   polish 
  and 
  occurs 
  in 
  the 
  Laurentian 
  formation. 
  He 
  also 
  states 
  

   that 
  he 
  has 
  secured 
  the 
  mining 
  rights 
  of 
  all 
  the 
  land 
  on 
  which 
  

   the 
  mineral 
  is 
  known 
  to 
  occur. 
  The 
  specimen 
  examined 
  has 
  a 
  

   very 
  distinct 
  cleavage, 
  vitreous 
  luster, 
  cobalt-blue 
  color, 
  hard- 
  

   ness 
  of 
  5 
  to 
  6, 
  and 
  a 
  colorless 
  streak. 
  It 
  loses 
  color, 
  fuses 
  with 
  

   intumescence 
  to 
  a 
  colorless 
  glass, 
  giving 
  a 
  strong 
  soda 
  flame, 
  

   and 
  is 
  soluble 
  in 
  hydrochloric 
  acid 
  with 
  separation 
  of 
  gelatinous 
  

   silica. 
  A 
  thin 
  section 
  in 
  parallel 
  polarized 
  light 
  appeared 
  of 
  a 
  

   pale 
  blue 
  color, 
  and 
  showed 
  by 
  a 
  few 
  cloudy 
  patches 
  traces 
  of 
  

   decomposition. 
  Between 
  crossed 
  nicols 
  it 
  was 
  perfectly 
  iso- 
  

   tropic. 
  

  

  The 
  other 
  known 
  occurrences 
  of 
  sodalite 
  in 
  this 
  country 
  are 
  : 
  

   Litchfield, 
  Me. 
  (blue) 
  ; 
  Salem, 
  Mass. 
  (violet-blue) 
  ; 
  Beemer- 
  

   ville, 
  N. 
  J. 
  (colorless 
  grains 
  in 
  elseolite 
  syenite)* 
  ; 
  Crazy 
  

   Mountains, 
  Mont. 
  ; 
  Brome, 
  Montreal 
  and 
  Belceil, 
  Canadaf 
  ; 
  

   and 
  Ice 
  River, 
  a 
  branch 
  of 
  the 
  Beaver 
  Foot 
  Biver, 
  near 
  Kick- 
  

   ing 
  Horse 
  Pass 
  in 
  the 
  Bocky 
  Mountains, 
  B. 
  C. 
  

  

  Prof. 
  Harrington 
  of 
  McGill 
  University, 
  Montreal, 
  is 
  at 
  

   present 
  preparing 
  a 
  report 
  on 
  Ontario 
  sodalite 
  and 
  other 
  

   Canadian 
  minerals. 
  

  

  Sodalite 
  from 
  the 
  Tirol 
  ^fountains, 
  Asia. 
  

  

  The 
  specimen 
  examined 
  from 
  this 
  locality 
  was 
  obtained 
  

   from 
  a 
  mineral 
  dealer 
  in 
  Ekatherinburg. 
  It 
  is 
  massive, 
  almost 
  

  

  * 
  J. 
  F. 
  Kemp, 
  Trans 
  N. 
  T. 
  Acad. 
  Sci., 
  vol. 
  xi. 
  p. 
  60. 
  

  

  |B. 
  J. 
  Harrington, 
  Trans. 
  Roy. 
  Soc. 
  Canada, 
  Sect. 
  Ill, 
  p. 
  81, 
  1886. 
  

  

  