﻿-ART. 
  2 
  

  

  COLBY, 
  WISCONSIN, 
  METEORIC 
  STONE— 
  MERRILL 
  

  

  Recalculated, 
  this 
  gave 
  the 
  following 
  totals: 
  

  

  SiOc 
  41. 
  39 
  

  

  A1 
  2 
  3 
  2. 
  83 
  

  

  Cr 
  2 
  3 
  0. 
  50 
  

  

  P 
  2 
  5 
  0. 
  25 
  

  

  FeO 
  15. 
  06 
  

  

  M11O 
  0. 
  45 
  

  

  CaO 
  none 
  

  

  MgO 
  29. 
  40 
  

  

  NiO 
  0. 
  21 
  

  

  CoO 
  0. 
  02 
  

  

  Na.O 
  1. 
  11 
  

  

  KsO. 
  

  

  Fe__ 
  

   Ni__ 
  

   Co__ 
  

   Fe__ 
  

  

  S___ 
  

  

  0.14 
  

   0.90 
  

   0.07 
  

   0.02 
  

   4.83 
  

   2.76 
  

  

  Silicate 
  portion. 
  

  

  Metallic 
  portion. 
  

  

  •Troilite. 
  

  

  99.94 
  

  

  Two 
  features 
  of 
  the 
  fall 
  of 
  this 
  stone, 
  as 
  reported, 
  are 
  of 
  unusual 
  

   interest. 
  (1,) 
  The 
  force 
  of 
  impact 
  which 
  was 
  such 
  as 
  to 
  fracture 
  a 
  

   piece 
  of 
  granite 
  two 
  inches 
  in 
  thickness 
  and 
  to 
  penetrate 
  the 
  stiff 
  

   clay 
  — 
  probably 
  ground 
  moraine 
  — 
  to 
  a 
  depth 
  of 
  five 
  feet, 
  and 
  (2,) 
  the 
  

   temperature, 
  which 
  was 
  so 
  low 
  that 
  frost 
  formed 
  immediately 
  upon 
  

   its 
  surface. 
  In 
  this 
  respect 
  the 
  fall 
  resembles 
  that 
  of 
  Dhurmsala. 
  

  

  The 
  statement 
  made 
  by 
  Professor 
  Ward 
  that 
  the 
  stone 
  was 
  an 
  

   achondrite 
  is 
  obviously 
  an 
  error, 
  due 
  either 
  to 
  a 
  superficial 
  examina- 
  

   tion 
  or 
  perhaps 
  a 
  typographical 
  error. 
  According 
  to 
  the 
  prevailing 
  

   method 
  it 
  should 
  be 
  classed 
  as 
  an 
  intermediate 
  chondrite. 
  

  

  o 
  

  

  