﻿Fig. 
  1. 
  

  

  Fig. 
  2. 
  

  

  xl90 
  

  

  x310 
  

  

  Fig. 
  3. 
  

  

  Fig. 
  4. 
  

  

  xl90 
  

  

  x 
  310 
  

  

  Fig. 
  5. 
  

  

  Fig. 
  6. 
  

  

  ''wmmmwtsBm 
  wtamm 
  

  

  . 
  

  

  4 
  \ 
  

  

  ■', 
  c 
  

  

  9 
  

  

  i 
  

  

  ' 
  

  

  | 
  j 
  

  

  • 
  

  

  

  

  . 
  

  

  t 
  

  

  

  

  i 
  

  

  

  i 
  

  

  

  

  K 
  k 
  

  

  

  f 
  ■* 
  

  

  

  . 
  

  

  

  1 
  * 
  

  

  I 
  

  

  $ 
  ; 
  

  

  

  x 
  310 
  

  

  x 
  123 
  

  

  Fig. 
  1, 
  0001 
  etched 
  by 
  fused 
  NaOH; 
  Fig. 
  2, 
  1010 
  by 
  the 
  same; 
  Fig. 
  3, 
  0001 
  

   byfused 
  KOH; 
  Fig. 
  4,1011 
  by 
  the 
  same; 
  Fig. 
  5, 
  1010 
  by 
  the 
  same; 
  Fig. 
  6, 
  

   101 
  and 
  0001, 
  showing 
  relative 
  solubility. 
  

  

  