﻿Cedar 
  Lcike, 
  North 
  Saskatchewan, 
  Canada. 
  333 
  

  

  The 
  writer 
  is 
  indebted 
  to 
  Mr. 
  Tyrrell 
  for 
  specimens 
  of 
  this 
  

   so-called 
  amber 
  from 
  Cedar 
  Lake, 
  and 
  the 
  results 
  of 
  their 
  

   examination, 
  as 
  far 
  as 
  completed, 
  will 
  now 
  be 
  given. 
  The 
  

   substance 
  was 
  in 
  pieces, 
  for 
  the 
  most 
  part 
  very 
  irregular 
  in 
  

   shape, 
  some 
  being 
  more 
  or 
  less 
  angular, 
  others 
  approximately 
  

   spherical, 
  and 
  others 
  flattened, 
  discoid 
  or 
  lenticular. 
  Some 
  of 
  

   the 
  pieces 
  were 
  smaller 
  than 
  a 
  pea, 
  but 
  they 
  ranged 
  from 
  this 
  

   up 
  to 
  the 
  size 
  of 
  an 
  ordinary 
  bean 
  (about 
  2 
  centimeters 
  long). 
  

   In 
  color 
  they 
  varied 
  from 
  pale 
  yellow 
  to 
  dark 
  brown, 
  and 
  

   many, 
  when 
  examined 
  by 
  transmitted 
  light, 
  appeared 
  clouded 
  

   or 
  banded 
  from 
  the 
  presence 
  of 
  black 
  carbonaceous 
  matter. 
  

   Superficially 
  they 
  were 
  generally 
  dull, 
  owing, 
  perhaps, 
  to 
  

   chemical 
  change, 
  but 
  on 
  fresh 
  surfaces 
  the 
  luster 
  was 
  resinous. 
  

   The 
  fracture 
  was 
  conchoidal. 
  Though 
  electric 
  on 
  friction, 
  

   they 
  appeared 
  to 
  be 
  less 
  strongly 
  so 
  than 
  ordinary 
  amber. 
  

  

  Light-colored 
  fragments, 
  free 
  from 
  black 
  carbonaceous 
  mat- 
  

   ter, 
  were 
  selected 
  for 
  examination, 
  and 
  any 
  superficial 
  crust 
  

   carefully 
  removed 
  by 
  scraping. 
  The 
  hardness 
  of 
  these 
  selected 
  

   pieces 
  was 
  fully 
  2£. 
  The 
  specific 
  gravity, 
  as 
  obtained 
  with 
  a 
  

   quantity 
  of 
  material 
  in 
  the 
  specific 
  gravity 
  bottle, 
  was 
  1*055 
  

   (at 
  20° 
  C), 
  and 
  a 
  single 
  fragment 
  gave 
  by 
  suspension 
  with 
  a 
  hair 
  

   L0543 
  (20° 
  C). 
  The 
  material 
  for 
  analysis 
  was 
  finely 
  powdered 
  

   and 
  dried 
  over 
  sulphuric 
  acid 
  in 
  vacuo. 
  The 
  combustions 
  

   were 
  made 
  with 
  lead 
  chromate 
  in 
  the 
  usual 
  way, 
  and 
  the 
  ash 
  

   determined 
  with 
  a 
  separate 
  portion 
  in 
  a 
  platinum 
  crucible. 
  

   The 
  following 
  are 
  the 
  results 
  obtained 
  : 
  

  

  I. 
  II. 
  Mean. 
  

  

  Carbon 
  80-01 
  79*91 
  79*96 
  

  

  Hydrogen 
  10*37 
  10*55 
  10*46 
  

  

  Oxygen 
  9*53 
  9*45 
  9*49 
  

  

  Ash 
  0-09 
  0*09 
  0*09 
  

  

  100-00 
  100-00 
  100*00 
  

   Excluding 
  the 
  ash 
  the 
  results 
  become 
  : 
  

  

  I. 
  II. 
  Mean. 
  

  

  Carbon 
  80*08 
  79*98 
  80-03 
  

  

  Hydrogen 
  . 
  10-38 
  10-56 
  10-47 
  

  

  Oxygen 
  9*54 
  9*46 
  9'50 
  

  

  100*00 
  100-00 
  100-00 
  

  

  The 
  ash 
  was 
  brick-red 
  in 
  color 
  and 
  found 
  to 
  contain 
  silica, 
  

   alumina, 
  iron, 
  lime, 
  and 
  magnesia. 
  

  

  The 
  only 
  solvents 
  whose 
  action 
  upon 
  the 
  resin 
  has 
  been 
  tried 
  

   as 
  yet 
  are 
  absolute 
  alcohol 
  and 
  absolute 
  ether, 
  and 
  the 
  effect 
  of 
  

   these 
  was 
  ascertained 
  as 
  follows 
  : 
  One 
  gram 
  of 
  the 
  finely 
  pow- 
  

  

  Am. 
  Jour. 
  Sci. 
  — 
  Third 
  Series, 
  Vol. 
  XLII, 
  No. 
  250. 
  — 
  October, 
  1891. 
  

   23 
  

  

  