﻿NEW 
  CHEMICAL 
  ELEMENTS 
  BLIGH 
  251 
  

  

  tion 
  had 
  been 
  efficient, 
  hence 
  the 
  importance 
  of 
  selecting 
  a 
  double 
  

   salt 
  whose 
  solubility 
  should 
  differ 
  appreciably 
  from 
  that 
  of 
  the 
  corre- 
  

   sponding 
  salt 
  of 
  associated 
  members 
  of 
  the 
  group. 
  A 
  further 
  confirm- 
  

   ation 
  was 
  supplied 
  by 
  the 
  line 
  frequencies 
  obtained 
  from 
  the 
  X-ray 
  

   spectrum 
  of 
  the 
  product. 
  Since 
  this 
  work 
  has 
  been 
  published 
  an 
  

   announcement 
  has 
  been 
  made 
  that 
  two 
  Italian 
  scientists 
  have 
  been 
  

   engaged 
  since 
  1922 
  on 
  the 
  problem 
  of 
  detecting 
  and 
  isolating 
  61 
  in 
  

   rare 
  earth 
  minerals, 
  using 
  repeated 
  fractional 
  crystallizations 
  as 
  a 
  

   means 
  of 
  separation. 
  A 
  thorough 
  examination 
  of 
  the 
  absorption 
  and 
  

   emission 
  spectrum 
  of 
  the 
  product 
  obtained 
  was 
  in 
  progress 
  when 
  the 
  

   report 
  of 
  the 
  American 
  chemists 
  appeared. 
  The 
  latter 
  have 
  proposed 
  

   illinium 
  as 
  the 
  name 
  of 
  the 
  new 
  element. 
  As 
  yet, 
  of 
  course, 
  very 
  little 
  

   experimental 
  information 
  is 
  available 
  as 
  to 
  the 
  properties 
  of 
  the 
  newly 
  

   discovered 
  elements. 
  An 
  extensive 
  field 
  of 
  work 
  remains 
  to 
  be 
  covered 
  

   in 
  devising 
  simpler 
  and 
  improved 
  methods 
  of 
  isolation 
  followed 
  by 
  a 
  

   detailed 
  study 
  of 
  chemical 
  and 
  physical 
  properties, 
  and 
  possible 
  prac- 
  

   tical 
  uses 
  and 
  applications. 
  Alany 
  of 
  the 
  rarest 
  and 
  most 
  sparsely 
  

   distributed 
  elements 
  have 
  been 
  found 
  to 
  possess 
  peculiar 
  properties 
  

   suiting 
  them 
  to 
  special 
  applications. 
  This 
  may 
  similarly 
  be 
  the 
  case 
  

   with 
  the 
  new 
  substances 
  giving 
  them 
  an 
  importance 
  distinct 
  from 
  

   their 
  academic 
  interest. 
  

  

  As 
  the 
  whole 
  problem 
  stands 
  at 
  present, 
  the 
  definite 
  indication 
  and 
  

   discovery 
  of 
  85 
  and 
  87, 
  as 
  well 
  as 
  any 
  of 
  atomic 
  number 
  higher 
  than 
  

   92 
  has 
  still 
  to 
  be 
  accomplished. 
  There 
  can 
  be 
  little 
  doubt 
  that 
  further 
  

   applications 
  and 
  refinements 
  of 
  the 
  lines 
  of 
  research 
  which 
  have 
  been 
  

   reviewed 
  above 
  will 
  at 
  an 
  early 
  date 
  bring 
  this 
  important 
  and 
  interest- 
  

   ing 
  line 
  of 
  work 
  to 
  a 
  conclusion. 
  

  

  