﻿

  

  

  

  

  Table 
  

  

  IIlc. 
  

  

  

  

  

  ^ 
  • 
  

  

  1 
  

  

  1 
  

  

  o" 
  

  

  o^W 
  

  

  ! 
  

  

  en 
  

  

  1 
  

  

  

  9 
  

  

  ?*? 
  

  

  1 
  

  

  

  s> 
  

  

  

  1 
  

  

  1 
  il 
  

  

  

  

  

  j 
  

  

  1 
  

  

  

  

  "a 
  

  

  1 
  1 
  

  

  1 
  

  

  o 
  

  

  

  11 
  :- 
  

   -5 
  So 
  

  

  

  1 
  

  

  o 
  o 
  ^ 
  

  

  

  s« 
  

  

  

  o 
  

  

  ^ 
  1^ 
  X 
  

  

  S 
  « 
  

  

  

  o 
  

  

  ^1-^ 
  X 
  

  

  

  A". 
  CaSO,+2H20 
  w^oi 
  

   with 
  excess 
  of 
  water 
  

   open 
  air; 
  compresse 
  

   2500 
  atm. 
  for 
  16 
  hrs. 
  

   131 
  rev. 
  per 
  min. 
  ; 
  v 
  = 
  

   S 
  = 
  20-4cm.-^ 
  29th 
  Mf 
  

  

  pitated 
  ; 
  

   dried 
  in 
  

   d 
  under 
  

   18° 
  C; 
  

   1500 
  cc; 
  

   ly, 
  1908. 
  

  

  B". 
  Anhydride 
  Cin^O^, 
  Nova 
  Sco- 
  

   tia 
  : 
  cut 
  to 
  a 
  disk 
  of 
  60 
  mm. 
  

   diameter 
  ; 
  17°-5 
  C. 
  ; 
  132 
  rev. 
  

   per 
  min.; 
  'y 
  = 
  1500 
  cc. 
  ; 
  2 
  = 
  

   19-63. 
  10th 
  June, 
  1908. 
  

  

  C". 
  CaSO^ 
  Anhydride, 
  pre- 
  

   cipitated. 
  Got 
  by 
  heating 
  

   at 
  310= 
  C. 
  for 
  4 
  to 
  5 
  hours, 
  

   compressed 
  to 
  a 
  disk 
  at 
  

   2500 
  atm. 
  ; 
  2=20^4cm.2 
  

  

  •000067 
  

  

  

  •0143930 
  

  

  2-797 
  

  

  •000050 
  

  

  8 
  

  

  •0144100 
  

  

  ■5698 
  

  

  From 
  the 
  top 
  surface 
  

  

  •000094 
  

  

  

  •0143660 
  

  

  

  •000094 
  

  

  

  •0143660 
  

  

  

  powder 
  comes 
  off, 
  i. 
  e. 
  can- 
  

  

  

  

  

  3-142 
  

  

  

  8 
  

  

  

  '6173 
  

  

  not 
  be 
  investigated. 
  It 
  is 
  

  

  •000124 
  

  

  

  •0143360 
  

  

  3-039 
  

  

  •000141 
  

  

  4 
  

  

  •0143190 
  

  

  -6302 
  

  

  well 
  known 
  that 
  while 
  

  

  •000153 
  

  

  

  •0143070 
  

  

  

  •000165 
  

  

  

  •0142950 
  

  

  

  CaSO^ 
  prepared 
  from' 
  

  

  •000185 
  

  

  

  •0142750 
  

  

  3-384 
  

  

  •0002040 
  

  

  6 
  

  

  •0142560 
  

  

  •6792 
  

  

  CaS04+2H20 
  at 
  80° 
  C. 
  in 
  

   air 
  current 
  absorbs 
  water 
  

  

  

  

  

  2-837 
  

  

  

  7 
  

  

  

  '6I4O 
  

  

  •000212 
  

  

  

  •0142480 
  

  

  

  •0002444 
  

  

  

  •0142155 
  

  

  

  rapidly 
  forming 
  CaS042H2O 
  

  

  •000269 
  

  

  2 
  

  

  •0141910 
  

  

  3-004 
  

  

  •0002889 
  

  

  8 
  

  

  •0141711 
  

  

  •5820 
  

  

  and 
  dissolving 
  in 
  water,' 
  

  

  

  3 
  

  

  

  3-056 
  

  

  

  10 
  

  

  

  •5971 
  

  

  the 
  CaSO^ 
  prepared 
  from 
  

  

  •000355 
  

  

  3 
  

  

  •0141045 
  

  

  3-073 
  

  

  •0003452 
  

  

  15 
  

  

  •0141148 
  

  

  •6536 
  

  

  CaS042H20 
  by 
  heating 
  at 
  

  

  •000442 
  

  

  

  •0140178 
  

  

  

  •0004372 
  

  

  

  •0140228 
  

  

  

  about 
  300° 
  C. 
  (as 
  in 
  our 
  

  

  

  6 
  

  

  

  3-063 
  

  

  

  6 
  

  

  

  •6636 
  

  

  case) 
  absorbs 
  water 
  and 
  

  

  •000613 
  

  

  6 
  

  

  •0138471 
  

  

  3-029 
  

  

  •0004743 
  

  

  ? 
  

  

  •0139857 
  

  

  ? 
  

  

  dissolves 
  in 
  water 
  very 
  

  

  •000780 
  

  

  

  •0136803 
  

  

  

  •0005060 
  

  

  

  •0139540 
  

  

  

  slowly. 
  

  

  

  11 
  

  

  

  2-986 
  

  

  

  20 
  

  

  

  •6754 
  

  

  Thus, 
  again, 
  the 
  speed 
  

  

  •001076 
  

  

  45 
  

  

  •0133839 
  

  

  3-166 
  

  

  •0006314 
  

  

  15 
  

  

  •0138286 
  

  

  •6557 
  

  

  of 
  solution 
  of 
  the 
  same 
  

  

  •002289 
  

  

  

  •0121710 
  

  

  

  •0007217 
  

  

  

  •0137383 
  

  

  

  CaSO^-Anhydride, 
  differ- 
  

  

  •003330 
  

  

  43 
  

  

  •0111300 
  

  

  3-087 
  

  

  -0008332 
  

  

  18 
  

  

  •0136268 
  

  

  '6782 
  

  

  ently 
  prepared, 
  is 
  different, 
  

  

  

  27 
  

  

  

  3-313 
  

  

  

  17 
  

  

  

  •6886 
  

  

  the 
  speed 
  of 
  combination 
  

  

  •003965 
  

  

  

  •0104950 
  

  

  

  -0009392 
  

  

  

  •0135208 
  

  

  

  of 
  the 
  CaSO/s 
  with 
  water, 
  

  

  •004558 
  

  

  30 
  

   10 
  

  

  •0099020 
  

  

  2-908 
  

   3-090 
  

  

  •0010642 
  

  

  C20 
  

  

  •0133958 
  

  

  •6976 
  

  

  which 
  is 
  also 
  a 
  heteroge- 
  

   neous 
  reaction, 
  is 
  different, 
  

  

  •004760 
  

   •004962 
  

  

  10 
  

  

  •0097000 
  

   •0091980 
  

  

  3-156 
  

  

  

  

  Average 
  

  

  ■643 
  

  

  and 
  the 
  speed 
  of 
  reaction 
  

   is 
  dependent 
  upon 
  the 
  phy- 
  

  

  

  

  10 
  

  

  

  2-852 
  

  

  Excellent 
  surface 
  ; 
  polishes 
  

  

  sical 
  state 
  of 
  the 
  solid, 
  not 
  

  

  •005141 
  

  

  

  •0093190 
  

  

  

  better 
  than 
  marble. 
  

  

  indep'endent 
  of 
  the 
  same. 
  

  

  

  

  

  Average 
  

  

  3-054 
  

  

  For 
  2 
  = 
  20^4 
  cm.2 
  

   K' 
  = 
  -67. 
  

  

  

  

  

  Excellent 
  surface. 
  

  

  

  

  

  For 
  2 
  = 
  20-4 
  c 
  

  

  m.2 
  

  

  

  

  K' 
  = 
  3-05^ 
  

  

  1. 
  

  

  

  

  