﻿288 
  

  

  Shannon 
  — 
  Anglesite 
  from 
  Idaho. 
  

  

  It 
  is 
  not 
  quite 
  clear 
  why, 
  under 
  these 
  conditions, 
  some 
  smith- 
  

   sonite 
  or 
  calamine 
  has 
  not 
  formed 
  from 
  the 
  sphalerite. 
  The 
  lat- 
  

   ter 
  mineral, 
  however, 
  was 
  not 
  abundant 
  in 
  the 
  ores 
  subjected 
  to 
  

   oxidation 
  and 
  it 
  is 
  by 
  no 
  means 
  certain 
  that 
  special 
  chemical 
  

   investigation 
  would 
  not 
  reveal 
  a 
  corresponding 
  small 
  quantity 
  

   of 
  zinc 
  in 
  the 
  oxidised 
  ores." 
  

  

  Since 
  the 
  above 
  was 
  written, 
  anglesite 
  has 
  been 
  identi- 
  

   fied 
  in 
  four 
  mines 
  in 
  the 
  district: 
  the 
  Highland- 
  Surprise 
  

   Mine 
  on 
  Pine 
  Creek, 
  the 
  Last 
  Chance 
  and 
  Tyler 
  Mines 
  at 
  

   Wardner, 
  and 
  the 
  Hypotheek 
  Mine 
  at 
  Kingston. 
  

  

  In 
  the 
  Highland- 
  Chief 
  tunnel 
  of 
  the 
  Highland-Surprise 
  

   mine, 
  anglesite 
  occurs 
  as 
  a 
  compact 
  massive 
  ash-gray 
  

   coating 
  around 
  lumps 
  of 
  galena, 
  the 
  anglesite 
  in 
  turn 
  

   being 
  coated 
  with 
  limonite. 
  The 
  mineral 
  is 
  similar 
  to 
  

   massive 
  anglesite 
  from 
  many 
  other 
  western 
  mining 
  dis- 
  

   tricts 
  and 
  warrants 
  no 
  special 
  description. 
  

  

  In 
  the 
  Last 
  Chance 
  mine, 
  prismatic 
  crystals, 
  elongated 
  

   parallel 
  to 
  the 
  &-axis, 
  were 
  occasionally 
  found 
  in 
  cavities 
  

   in 
  galena. 
  Some 
  of 
  these 
  reached 
  an 
  extreme 
  length 
  of 
  

   two 
  inches, 
  the 
  general 
  appearance 
  being 
  similar 
  to 
  ^.g. 
  1. 
  

   These 
  were 
  commonly 
  smoky 
  gray 
  to 
  black 
  from 
  included 
  

   unoxidised 
  galena. 
  In 
  the 
  adjacent 
  Tyler 
  mine, 
  anglesite 
  

  

  