﻿347 
  

  

  According 
  to 
  Mr. 
  Dana, 
  the 
  crystals 
  from 
  Johnsburg, 
  in 
  Warren 
  

   county, 
  sometimes 
  have 
  a 
  tesselated 
  structure. 
  The 
  accompanying 
  fig- 
  

   ure 
  represents 
  the 
  appearance 
  of 
  one 
  of 
  the 
  crystals. 
  Sill. 
  Jour., 
  xlvi., 
  

   p. 
  36. 
  

  

  CLASS 
  VII. 
  

  

  METALLIC 
  MINERALS. 
  

  

  NATIVE 
  IKON. 
  

  

  (Mineralogy 
  of 
  New- 
  York, 
  page 
  382.) 
  

  

  Since 
  the 
  publication 
  of 
  my 
  Mineralogy, 
  several 
  interesting 
  facts 
  in 
  

   regard 
  to 
  the 
  occurrence 
  of 
  native 
  iron 
  in 
  this 
  State 
  have 
  been 
  made 
  

   known. 
  

  

  Dr. 
  Emmons 
  has 
  described 
  a 
  specimen 
  which 
  he 
  calls 
  native 
  iron, 
  

   said 
  to 
  have 
  been 
  obtained 
  from 
  the 
  vicinity 
  of 
  Catskill, 
  in 
  Greene 
  

   county. 
  It 
  is 
  in 
  the 
  form 
  of 
  laminae, 
  which 
  are 
  about 
  one-thirtieth 
  of 
  an 
  

   inch 
  in 
  thickness. 
  Sp. 
  gr.6'58. 
  It 
  dissolves 
  completely 
  in 
  warm 
  sulphuric 
  

   or 
  muriatic 
  acid, 
  and 
  when 
  nitric 
  acid 
  is 
  added, 
  ammonia 
  precipitates 
  the 
  

   peroxide 
  of 
  iron. 
  It 
  is 
  strongly 
  attracted 
  by 
  the 
  magnet. 
  The 
  lamina? 
  

   are 
  only 
  slightly 
  flexible, 
  but 
  are 
  entirely 
  destitute 
  of 
  malleability. 
  

   Amer. 
  Quart. 
  Jour, 
  of 
  Science, 
  ii., 
  p. 
  367. 
  

  

  B. 
  Silliman, 
  Jr., 
  describes 
  a 
  mass 
  of 
  meteoric 
  iron 
  found 
  a 
  short 
  dis- 
  

   tance 
  below 
  the 
  surface 
  of 
  the 
  earth 
  in 
  Cambria, 
  near 
  Lockport, 
  Niaga- 
  

   ra 
  county. 
  On 
  analysis 
  it 
  Avas 
  found 
  to 
  contain 
  iron 
  94*22; 
  nickel 
  

   6-35. 
  Sill. 
  Jour., 
  xlviii., 
  p. 
  388. 
  

  

  For 
  a 
  notice 
  and 
  analysis 
  of 
  a 
  mass 
  of 
  meteoric 
  iron 
  found 
  in 
  the 
  town 
  

   of 
  Burlington, 
  Otsego 
  county, 
  see 
  Sill. 
  Jour., 
  xlvi., 
  p. 
  401. 
  

  

  MAGNETIC 
  IRON 
  ORE. 
  

   (Mineralogy 
  of 
  New- 
  York, 
  page 
  383.) 
  

   Crystals 
  of 
  this 
  mineral 
  have 
  been 
  found 
  in 
  a 
  mine 
  near 
  Port 
  Henry, 
  

   in 
  Essex 
  county. 
  They 
  are 
  regular 
  octahedrons 
  from 
  ^ 
  to 
  | 
  of 
  an 
  inch 
  

   in 
  diameter, 
  and 
  are 
  strongly 
  magnetic. 
  For 
  these 
  interesting 
  speci- 
  

   mens 
  I 
  am 
  indebted 
  to 
  Mr. 
  Charles 
  Thomas. 
  

  

  