﻿FIFTH 
  REPORT 
  OF 
  THE 
  DIRECTOR 
  I908 
  

  

  219 
  

  

  The 
  following 
  measurements 
  served 
  to 
  identify 
  the 
  occurring 
  

   forms: 
  

  

  

  

  

  NUMBER 
  

  

  

  

  

  

  LETTER 
  

  

  ANGLE 
  

  

  OP 
  

  

  MEASURED 
  

  

  CALCULATED 
  

  

  

  

  

  READINGS 
  

  

  

  

  

  

  

  

  

  

  

  

  / 
  

  

  

  

  , 
  

  

  ^.: 
  <l" 
  

  

  0II2 
  

  

  : 
  1102 
  

  

  3 
  

  

  45 
  

  

  12 
  

  

  45 
  

  

  3 
  

  

  p".: 
  ^. 
  

  

  OIII 
  

  

  :o554 
  

  

  5 
  

  

  95 
  

  

  22 
  

  

  95 
  

  

  34 
  

  

  <5.: 
  //. 
  

  

  OII2 
  

  

  : 
  0881 
  

  

  4 
  

  

  S6 
  

  

  14 
  

  

  56 
  

  

  32 
  

  

  //.; 
  a 
  

  

  0881 
  

  

  : 
  1120 
  

  

  4 
  

  

  30 
  

  

  50 
  

  

  30 
  

  

  47 
  

  

  p.: 
  m. 
  

  

  lOII 
  

  

  : 
  4041 
  

  

  I 
  

  

  31 
  

  

  14 
  

  

  31 
  

  

  loi 
  

  

  p.: 
  A-: 
  

  

  10 
  I 
  I 
  

  

  : 
  2131 
  

  

  4 
  

  

  29 
  

  

  4 
  

  

  29 
  

  

  2 
  

  

  K:: 
  h-r 
  

  

  2131 
  

  

  : 
  3121 
  

  

  I 
  

  

  35 
  

  

  33 
  

  

  35 
  

  

  36 
  

  

  p.: 
  <■>: 
  

  

  ■ 
  lOII 
  

  

  :8.5.i3-3 
  

  

  5 
  

  

  35 
  

  

  57 
  

  

  35 
  

  

  47 
  

  

  '*'.'. 
  \ 
  

  

  8.5.I3-3 
  

  

  : 
  I3-5-8.3 
  

  

  I 
  

  

  43 
  

  

  22 
  

  

  43 
  

  

  13 
  

  

  p.: 
  s: 
  

  

  lOII 
  

  

  : 
  I7-I3-30 
  4 
  

  

  5 
  

  

  42 
  

  

  43 
  i 
  

  

  42 
  

  

  40 
  

  

  s\\ 
  s\ 
  

  

  I7-I3-30-4 
  

  

  : 
  30. 
  13. 
  17.4 
  

  

  I 
  

  

  50 
  

  

  27 
  

  

  50 
  

  

  ZZ 
  

  

  t: 
  t 
  

  

  3. 
  13. 
  16. 
  8 
  

  

  : 
  3. 
  16. 
  13. 
  8 
  

  

  4 
  

  

  17 
  

  

  31 
  

  

  17 
  

  

  47 
  

  

  t: 
  t'' 
  

  

  3.I3-I6.8 
  

  

  : 
  13. 
  3. 
  16. 
  8 
  

  

  4 
  

  

  69 
  

  

  6 
  

  

  69 
  

  

  li 
  

  

  2 
  Calcite 
  from 
  Jersey 
  City, 
  N. 
  J. 
  

  

  Among 
  the 
  minerals 
  recently 
  collected 
  from 
  the 
  Erie 
  railroad 
  

   open 
  cut 
  which 
  is 
  being 
  excavated 
  through 
  the 
  Jura 
  trias 
  diabase 
  at 
  

   Jersey 
  City 
  are 
  several 
  specimens 
  of 
  calcite 
  which 
  present 
  an 
  inter- 
  

   esting 
  instance 
  of 
  parallel 
  grouping 
  somewhat 
  similar 
  to 
  that 
  pre- 
  

   viously 
  noted 
  from 
  Plainfield. 
  These 
  specimens, 
  which 
  w^ere 
  col- 
  

   lected 
  by 
  Mr 
  James 
  G. 
  Manchester, 
  have 
  through 
  the 
  courtesy 
  of 
  

   Mr 
  Manchester 
  been 
  made 
  available 
  for 
  study. 
  The 
  calcite 
  occurs 
  

   in 
  veins 
  in 
  the 
  diabase 
  associated 
  with 
  datolite, 
  apophyllite, 
  natro- 
  

   lite 
  and 
  stilbite 
  all 
  beautifully 
  crystallized. 
  The 
  compound 
  crystals, 
  

   like 
  those 
  from 
  Plainfield 
  consist 
  of 
  two 
  superposed 
  habits 
  corre- 
  

   sponding 
  to 
  two 
  generations 
  of 
  calcite 
  deposition. 
  The 
  earlier 
  

   generation 
  is 
  represented 
  by 
  crystals 
  of 
  a 
  simple 
  rhombohedral 
  

   habit 
  consisting 
  of 
  the 
  negative 
  rhombohedron 
  -. 
  (0775). 
  In 
  a 
  

   number 
  of 
  instances 
  these 
  rhombohedral 
  elements 
  occur 
  uncom- 
  

  

  