﻿298 
  W. 
  F. 
  Ilillebrand 
  — 
  Mineralogical 
  Notes. 
  

  

  The 
  results 
  were 
  as 
  follows 
  : 
  

  

  Ratios. 
  

  

  Au 
  25-16 
  ) 
  l-OO 
  

  

  Ag 
  41-87 
  \ 
  ^ 
  ^^ 
  3-04 
  

  

  Te. 
  _ 
  33-21 
  1-00 
  

  

  Se 
  trace 
  

  

  Mo 
  -08 
  

  

  100-32 
  

  

  Approximate 
  specific 
  gravity 
  at 
  23° 
  C. 
  8-925, 
  The 
  molyb- 
  

   denum 
  may 
  exist 
  as 
  sulphide. 
  The 
  ratios 
  lead 
  almost 
  exactly 
  

   to 
  the 
  formula 
  Au/Ie, 
  3Ag,Te. 
  

  

  Hessite. 
  

  

  In 
  conclusion 
  may 
  be 
  given 
  an 
  analysis 
  of 
  hessite 
  from 
  a 
  

   new 
  locality, 
  San 
  Sebastian, 
  Jalisco, 
  Mexico, 
  the 
  material 
  being 
  

   received 
  from 
  Mr. 
  Frederic 
  Chisolm. 
  

  

  Specific 
  gravity 
  at 
  26° 
  C. 
  8-24 
  

  

  Ag 
  61-16 
  

  

  Te 
  36-11 
  

  

  Pb 
  1-90 
  

  

  S, 
  Fe, 
  Zn 
  -83. 
  (difference) 
  

  

  10000 
  

  

  Laboratory 
  of 
  the 
  U. 
  S. 
  Geclogical 
  Survey, 
  June, 
  1899. 
  

  

  