﻿THE 
  MINING 
  AND 
  QUARRY 
  INDUSTRY 
  I907 
  1 
  3 
  

  

  The 
  ore 
  occurrence 
  was 
  described 
  briefly 
  in 
  the 
  preceding 
  issue 
  

   of 
  this 
  report. 
  It 
  consists 
  of 
  arsenopyrite 
  and 
  subordinate 
  

   pyrite 
  with 
  a 
  quartz 
  gangue 
  occurring 
  in 
  veins 
  that 
  cut 
  the 
  

   gneiss 
  country 
  rock 
  in 
  proximity 
  to 
  a 
  basic 
  dike 
  now 
  altered 
  to 
  

   serpentine. 
  The 
  veins 
  are 
  made 
  up 
  of 
  a 
  number 
  of 
  parallel 
  

   stringers 
  closely 
  set 
  and 
  forming 
  what 
  is 
  properly 
  called 
  a 
  lode. 
  

   There 
  are 
  two 
  such 
  lodes 
  of 
  which 
  the 
  one 
  worked 
  has 
  a 
  north- 
  

   erly 
  strike 
  and 
  is 
  from 
  12 
  to 
  20 
  feet 
  wide 
  while 
  the 
  second 
  lode 
  

   intersecting 
  at 
  an 
  angle 
  of 
  6o° 
  has 
  been 
  only 
  prospected. 
  The 
  

   ore 
  body 
  is 
  opened 
  by 
  a 
  vertical 
  shaft 
  bottomed 
  at 
  100 
  feet 
  from 
  

   which 
  a 
  drift 
  has 
  been 
  run 
  along 
  the 
  course 
  of 
  the 
  lode. 
  It 
  is 
  

   about 
  12 
  feet 
  wide 
  in 
  the 
  drift. 
  

  

  During 
  the 
  past 
  year 
  the 
  company 
  has 
  installed 
  a 
  plant 
  for 
  

   concentrating 
  the 
  low 
  grade 
  material. 
  The 
  process 
  as 
  described 
  

   by 
  Edward 
  K. 
  Judd, 
  1 
  consists 
  in 
  passing 
  the 
  ore 
  through 
  a 
  jaw 
  

   crusher 
  and 
  rolls 
  and 
  treating 
  on 
  hydraulic 
  jigs 
  of 
  the 
  Joplin 
  

   type. 
  There 
  are 
  eight 
  jigs 
  run 
  by 
  hand 
  and 
  provided 
  with 
  %. 
  

   inch 
  screens. 
  The 
  arsenopyrite 
  is 
  recovered 
  from 
  the 
  hutch 
  

   only, 
  the 
  material 
  on 
  the 
  screens 
  being 
  rejected. 
  The 
  jig 
  capa- 
  

   city 
  is 
  A^/2 
  tons 
  of 
  crude 
  ore 
  or 
  1^ 
  tons 
  of 
  concentrates 
  each 
  

   per 
  day. 
  The 
  concentrates 
  average 
  25 
  per 
  cent 
  arsenic. 
  

  

  A 
  sample 
  of 
  the 
  high 
  grade 
  ore 
  gave 
  the 
  following 
  percentages 
  

   on 
  analysis 
  : 
  

  

  Silica 
  2 
  . 
  90 
  

  

  Iron 
  36 
  . 
  1 
  1 
  

  

  Copper 
  2.17 
  

  

  Sulfur 
  22 
  . 
  72 
  

  

  Arsenic 
  36 
  . 
  00 
  

  

  99.90 
  

  

  Arsenopyrite 
  occurs 
  near 
  Edenville 
  and 
  at 
  other 
  localities 
  in 
  

   Orange 
  county, 
  and 
  in 
  the 
  town 
  of 
  Lewis, 
  Essex 
  co., 
  10 
  miles 
  

   south 
  of 
  Keeseville. 
  The 
  Edenville 
  deposit 
  carries 
  also 
  leucopy- 
  

   rite, 
  the 
  diarsenid 
  of 
  iron 
  and 
  scorodite, 
  a 
  hydrous 
  arsenate 
  of 
  

   iron. 
  

  

  CEMENT 
  

  

  There 
  were 
  few 
  changes 
  of 
  note 
  in 
  the 
  hydraulic 
  cement 
  indus- 
  

   try 
  during 
  1907. 
  A 
  fairly 
  active 
  demand 
  existed 
  throughout 
  

   most 
  of 
  the 
  year, 
  but 
  as 
  in 
  other 
  manufacturing 
  lines 
  a 
  sharp 
  

   market 
  decline 
  took 
  place 
  in 
  the 
  last 
  three 
  months. 
  Except 
  for 
  

  

  Eng. 
  & 
  Min. 
  Jour. 
  Feb. 
  8, 
  1908. 
  

  

  