﻿Am. 
  Jour, 
  Sci., 
  Vol. 
  XLIX, 
  1895, 
  

  

  Plate 
  IV. 
  

  

  l 
  

  

  L 
  ORDER 
  

  

  3?? 
  Colored 
  group 
  4t« 
  colored 
  Group 
  

  

  % 
  

  

  % 
  Di 
  Sm 
  Er 
  

  

  \^ 
  Os 
  lr 
  Pt 
  Au 
  ^Bi 
  i 
  

  

  W 
  /ks 
  150 
  169 
  

  

  S 
  W^I92 
  192.5 
  194 
  I96\ 
  S 
  k 
  1 
  

   la/" 
  84 
  \ 
  Tl 
  M\ 
  / 
  

  

  /i82 
  V/^sy 
  v 
  

  

  H 
  i 
  1 
  Cs 
  Ba 
  La 
  Hg 
  Pb 
  Th 
  

   l 
  5 
  127 
  132 
  137 
  139 
  200 
  206 
  234 
  

  

  RLESS 
  

  

  Alternate 
  Series 
  

  

  !40 
  

  

  