﻿140 
  Uhler 
  and 
  Patterson 
  — 
  Arc 
  Spectrum 
  of 
  Telhtrium. 
  

  

  trie 
  arc. 
  The 
  crystals 
  in 
  the 
  vial 
  labelled 
  " 
  alpha 
  sub. 
  8., 
  at' 
  

   w't. 
  126*6 
  " 
  seemed 
  to 
  be 
  as 
  pure 
  as 
  the 
  127*45 
  material. 
  The 
  

   same 
  statement 
  applies 
  to 
  the 
  sample 
  marked 
  " 
  Te0 
  2 
  . 
  124*3 
  

   Redistilled 
  fraction 
  10". 
  One 
  negative 
  showed 
  more 
  copper 
  

   for 
  124*3 
  than 
  for 
  127*45, 
  but 
  another 
  negative 
  did 
  not. 
  Con- 
  

   sequently 
  the 
  discrepancy 
  must 
  be 
  ascribed 
  to 
  slight, 
  unavoid- 
  

   able 
  changes 
  in 
  the 
  conditions 
  of 
  the 
  arc. 
  The 
  orange-yellow 
  

   crystals 
  (" 
  beta. 
  P' 
  p't. 
  by 
  NH 
  4 
  OH 
  and 
  boiling 
  ") 
  gave 
  a 
  fairly 
  

   complete 
  spectrum 
  of 
  iron. 
  From 
  the 
  spectroscopic 
  stand- 
  

   point 
  we 
  would 
  say 
  that 
  a 
  great 
  deal 
  of 
  iron 
  was 
  present. 
  The 
  

   usual 
  trace 
  of 
  copper 
  was 
  recorded. 
  At 
  our 
  request 
  Professor 
  

   Browning 
  subjected 
  some 
  of 
  the 
  yellow 
  crystals 
  to 
  a 
  delicate 
  

   chemical 
  test 
  for 
  iron 
  and 
  found 
  this 
  metal 
  to 
  be 
  present, 
  thus 
  

   verifying 
  our 
  analysis. 
  However, 
  he 
  did 
  not 
  think 
  that 
  the 
  

   percentage 
  of 
  iron 
  was 
  at 
  all 
  great. 
  The 
  test 
  seems 
  to 
  have 
  

   been 
  definite 
  but 
  not 
  pronounced. 
  These 
  results 
  are 
  at 
  vari- 
  

   ance 
  with 
  Doctor 
  Flint's 
  statement 
  that 
  " 
  No 
  slightest 
  traces 
  

   of 
  either 
  iron 
  or 
  copper 
  can 
  be 
  discovered 
  by 
  the 
  usual 
  tests"*. 
  

   There 
  was 
  no 
  discernible 
  difference 
  between 
  the 
  metallic 
  tellu- 
  

   rium 
  which 
  had 
  been 
  distilled 
  once 
  and 
  twice 
  in 
  hydrogen. 
  

   The 
  lines 
  of 
  sodium 
  were 
  very 
  strong 
  and 
  there 
  were 
  some 
  

   lines 
  of 
  antimony, 
  iron, 
  and 
  lead. 
  Copper 
  was 
  not 
  at 
  all 
  strong. 
  

   It 
  would 
  seem, 
  therefore, 
  that 
  the 
  particular 
  process 
  of 
  distilla- 
  

   tion 
  used 
  by 
  Flint 
  is 
  illusory. 
  

  

  In 
  conclusion 
  we 
  desire 
  to 
  state 
  that 
  our 
  work 
  on 
  the 
  spec- 
  

   troscopic 
  properties 
  of 
  tellurium 
  will 
  be 
  continued 
  during 
  the 
  

   next 
  academic 
  year. 
  Also 
  we 
  desire 
  to 
  express 
  our 
  sense 
  of 
  

   deep 
  indebtedness 
  to 
  Professor 
  Browning 
  for 
  having 
  supplied 
  

   us 
  with 
  the 
  large 
  quantities 
  of 
  tellurium. 
  

  

  Sloane 
  Physical 
  Laboratory, 
  Yale 
  University, 
  

   New 
  Haven, 
  Conn., 
  June, 
  1913. 
  

  

  *This 
  Journal, 
  vol. 
  xxx, 
  p. 
  219, 
  Sept., 
  1910. 
  

  

  