﻿Table 
  III 
  b. 
  

  

  3 
  S 
  . 
  

  

  o 
  o 
  

  

  

  

  I 
  " 
  

   X 
  

  

  '. 
  Selenite 
  or 
  ^laricnglass 
  (the 
  

   large, 
  flat 
  surface 
  of 
  the 
  twin 
  

   crystal), 
  i^"^ 
  C. 
  , 
  

   min.; 
  i;=1500cc. 
  

  

  131 
  rev. 
  per 
  

   S 
  = 
  26 
  cm.2 
  

  

  B'. 
  Selenite 
  orMariengJass 
  (sur- 
  

   faces 
  cut 
  vertically 
  to 
  the 
  sur- 
  

   face 
  of 
  A' 
  and 
  cemented 
  with 
  

   paraffin). 
  17°-3 
  C; 
  130 
  rev. 
  

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

   24 
  cm. 
  2 
  25th 
  May, 
  1908. 
  

  

  O 
  o^ 
  

  

  ^ 
  

  

  

  

  

  .?< 
  

  

  

  CJ 
  

  

  3 
  

  

  • 
  

  

  1 
  

  

  C 
  

  

  O 
  

  

  o 
  

  

  y 
  

  

  1 
  

  

  h 
  

  

  « 
  

  

  O 
  

  

  c 
  

  

  

  

  

  u 
  

  

  ts 
  

  

  

  ?> 
  

  

  O 
  \A 
  

  

  C. 
  Selenite 
  or 
  Marienglass 
  (pow- 
  

   dered 
  and 
  compressed 
  to 
  a 
  

   disk 
  under 
  2500 
  atm. 
  during 
  

   16 
  hours). 
  17°-4 
  0.; 
  131 
  rev. 
  

   per 
  min.; 
  y=:1500 
  cc. 
  ; 
  S 
  = 
  

   20-4 
  cm.2 
  

  

  :O01600 
  

  

  

  ■0143000 
  

  

  

  •0001392 
  

  

  

  •0143208 
  

  

  

  i 
  '0000680 
  

  

  

  •0143920 
  

  

  

  1002754 
  

  

  25 
  

  

  ,•0141846 
  

  

  ^mJ^ 
  

  

  •0001722 
  

  

  1 
  

  

  '•0142878 
  

  

  $•457 
  

  

  •0000930 
  

  

  1 
  

  

  •0143670 
  

  

  £•590 
  

  

  .•003701 
  

  

  20 
  

  

  •0140899 
  

  

  \ 
  '5026 
  

  

  •0002019 
  

  

  

  •0142581 
  

  

  \ 
  3-018 
  

  

  0001452 
  

  

  2 
  

  

  •0143148 
  

  

  2-740 
  

  

  :004743 
  

  

  20 
  

  

  •0139857 
  

  

  '5571 
  

  

  •0002308 
  

  

  

  •0142292 
  

  

  2-970 
  

  

  •0002067 
  

  

  2 
  

  

  •0142533 
  

  

  3-240 
  

  

  

  ,10 
  

  

  

  '6G3S1 
  

  

  

  1 
  

  

  

  3^595 
  

  

  

  2 
  

  

  

  2-858 
  

  

  :005360 
  

  

  

  •0139240 
  

  

  1 
  

  

  •0002634 
  

  

  

  •0141966 
  

  

  

  •0002611 
  

  

  

  •0141989 
  

  

  

  

  i 
  10 
  

  

  1 
  

  

  j 
  -5700 
  

  

  

  

  

  3-035 
  

  

  

  2 
  

  

  

  2-742 
  

  

  .005890 
  

  

  1 
  

  

  •0138710 
  

  

  

  •0002929 
  

  

  

  •0141671 
  

  

  

  •0003130 
  

  

  

  •0141470 
  

  

  

  1 
  10 
  

  

  1 
  

  

  \ 
  '5767 
  

  

  

  2 
  

  

  

  3-376 
  

  

  

  2 
  

  

  

  2-902 
  

  

  006420 
  

  

  

  ■ 
  0138180 
  

  

  i 
  

  

  •0003555 
  

  

  

  •0141045 
  

  

  

  •0003674 
  

  

  

  •0140926 
  

  

  

  

  10 
  

  

  

  1 
  '60S0 
  

  

  

  6 
  

  

  

  3^415 
  

  

  

  2 
  

  

  

  2-900 
  

  

  006980 
  

  

  

  •0137620 
  

  

  

  •0005470 
  

  

  

  •0139130 
  

  

  

  •0004220 
  

  

  

  •0140380 
  

  

  

  ,007585 
  

  

  10 
  

  

  |oi37015 
  

  

  ■6610 
  

  

  •0006472 
  

  

  3 
  

  

  0138762 
  

  

  3-620 
  

  

  0004780 
  

  

  2 
  

  

  •0139820 
  

  

  3'004 
  

  

  

  15 
  

  

  

  •6683 
  

  

  

  7 
  

  

  

  3-895 
  

  

  

  4 
  

  

  

  2-920 
  

  

  008499 
  

   009392 
  

  

  15 
  

   15 
  

  

  0136101 
  

   •0135208 
  

  

  •6578 
  

   •6976 
  

  

  •0008964 
  

  

  • 
  

  

  •0138128 
  

   Average 
  

  

  

  •0005864 
  

   0006367 
  

  

  2 
  

  

  8 
  

  

  •0138736 
  

   ■0138233 
  

  

  2-728 
  

   2-931 
  

  

  3-376 
  

  

  0110328 
  

  

  •0134272 
  

  

  

  

  

  •0008514 
  

  

  •0136086 
  

  

  

  15 
  

  

  

  •6398 
  

  

  

  

  

  

  10 
  

  

  

  2'955 
  

  

  011182 
  

  

  

  •0133418 
  

  

  

  

  

  

  •0011171 
  

  

  

  •0133429 
  

  

  

  012026 
  

  

  15 
  

  

  •0132574 
  

  

  '6365 
  

  

  

  

  

  •0015082 
  

  

  15 
  

  

  •0129518 
  

  

  2-977 
  

  

  012910 
  

  

  15 
  1 
  

  

  I-0131690 
  

  

  •6658 
  

  

  E 
  

  

  xcelle 
  

  

  nt 
  surface. 
  

  

  •0020454 
  

  

  21 
  

   12 
  

   11 
  

  

  •0124146 
  

  

  3-016 
  

   2-950 
  

   2-973 
  

  

  ' 
  

  

  1 
  Average! 
  '6137 
  

  

  TT 
  

  

  3r2= 
  

  

  =20^4 
  cm.2 
  

   =2"87. 
  

  

  •0023390 
  

  

  •0121250 
  

  

  

  J? 
  

  

  •0025910 
  

  

  •0118690 
  

  

  ! 
  Block 
  pol 
  

  

  ished 
  again. 
  

  

  

  

  

  •0031230 
  

  

  23 
  

  

  •0113370 
  

   Average 
  

  

  2-990 
  

  

  bl291 
  

  

  15 
  

  

  •0131690 
  

  

  '6407 
  

  

  2-907 
  

  

  01375 
  

   01453 
  

  

  

  •0130852 
  

   •0130070 
  

  

  

  

  

  

  

  

  

  15 
  

  

  •6002 
  

  

  

  

  

  

  

  

  30 
  

  

  

  •6050 
  

  

  

  

  

  

  

  016093 
  

  

  15 
  

  

  •0128504 
  

  

  •7054 
  

  

  

  

  

  Ve 
  

  

  ry 
  good 
  surface. 
  

  

  01700 
  

  

  i 
  

  

  

  •0127600 
  

   Average 
  

  

  

  

  

  

  F( 
  

  

  Dr 
  2=20-4 
  cm.2 
  

   K'=2-9. 
  

  

  •6378 
  

  

  Excellent 
  surface. 
  

  

  or 
  2=20-4 
  cm.2 
  

  

  

  

  

  

  

  K' 
  = 
  -49 
  (average). 
  

  

  

  

  

  

  

  •40 
  (in 
  the 
  three 
  greatest 
  

  

  

  

  

  

  

  1 
  dilutions). 
  

  

  1 
  

  

  

  

  

  

  

  