﻿306 
  on 
  the 
  occurrence 
  op 
  sapphires 
  and 
  rubies 
  in 
  situ. 
  

  

  Discussion. 
  

  

  Mr. 
  Warington 
  W. 
  Smyth 
  considered 
  the 
  communication 
  made 
  

   by 
  Col. 
  Jenks 
  as 
  a 
  very 
  important 
  and 
  interesting 
  one. 
  He 
  referred 
  

   to 
  the 
  nature 
  of 
  these 
  gems, 
  and 
  expressed 
  a 
  hope 
  that 
  Col. 
  Jenks's 
  

   further 
  operations 
  might 
  result 
  in 
  the 
  discovery 
  of 
  large 
  and 
  fine 
  

   crystals. 
  

  

  Mr. 
  D. 
  Forbes 
  remarked 
  that 
  much 
  credit 
  was 
  due 
  to 
  Col. 
  Jenks 
  

   for 
  having 
  followed 
  up 
  the 
  fragmentary 
  evidence 
  which 
  he 
  originally 
  

   obtained 
  with 
  such 
  good 
  results. 
  The 
  origin 
  of 
  these 
  gems 
  had 
  

   long 
  been 
  a 
  disputed 
  point 
  ; 
  all 
  those 
  hitherto 
  obtained 
  have 
  been 
  

   found 
  in 
  a 
  waterworn 
  state 
  in 
  the 
  beds 
  of 
  streams. 
  Col. 
  Jenks 
  

   had 
  discovered 
  the 
  actual 
  home 
  of 
  the 
  so-called 
  oriental 
  ruby 
  and 
  

   sapphire. 
  

  

  Prof. 
  Tennant 
  observed 
  that 
  Mr. 
  Sheppard 
  had 
  years 
  ago 
  brought 
  

   home 
  sapphires 
  from 
  the 
  same 
  district. 
  They 
  were 
  obtained 
  from 
  

   the 
  beds 
  of 
  rivers. 
  

  

  Col. 
  Jenks 
  gave 
  some 
  further 
  statements 
  with 
  regard 
  to 
  the 
  depth 
  

   to 
  whieh 
  the 
  corundum- 
  veins 
  referred 
  to 
  in 
  his 
  paper 
  have 
  been 
  

   worked, 
  and 
  stated 
  that 
  some 
  of 
  the 
  crystals 
  obtained 
  from 
  the 
  

   veins 
  could 
  be 
  broken 
  across 
  by 
  a 
  very 
  slight 
  pressure 
  in 
  the 
  fingers 
  

   when 
  first 
  taken 
  from 
  the 
  vein, 
  but 
  that 
  they 
  became 
  hard 
  by 
  

   exposure 
  to 
  the 
  air. 
  

  

  