﻿350 
  Mr. 
  0, 
  Cuthbertson 
  on 
  the 
  Arrangement 
  of 
  

  

  Prof. 
  J. 
  8. 
  Ames's 
  arrangement 
  of 
  the 
  Second 
  Group. 
  

  

  I. 
  

  

  II. 
  

  

  III. 
  

  

  IV. 
  

  

  V. 
  

  

  

  

  

  

  2010-05 
  

  

  

  

  

  

  141-23 
  

  

  

  

  

  

  2151-28 
  

  

  

  

  

  

  144-25 
  

  

  

  

  

  2117-48 
  

  

  2295-53 
  

  

  

  

  

  147-17 
  

  

  147-07 
  

  

  

  

  2077-32 
  

  

  2264 
  65 
  

  

  2442-60 
  

  

  

  

  150-05 
  

  

  150-11 
  

  

  150-16 
  

  

  

  2033-72 
  

  

  2227-37 
  

  

  2414-76 
  

  

  2592-76 
  

  

  

  152-69 
  

  

  153-10 
  

  

  153-13 
  

  

  152-98 
  

  

  

  2186-41 
  

  

  2380-47 
  

  

  2567-89 
  

  

  2745-74 
  

  

  

  155-98 
  

  

  155-96 
  

  

  155-90 
  

  

  156-01 
  

  

  2143-CO 
  

  

  2342-39 
  

  

  2536-43 
  

  

  2723-79 
  

  

  2901-75 
  

  

  158-81 
  

  

  158-86 
  

  

  158-88 
  

  

  158-82 
  

  

  158-69 
  

  

  2301-81 
  

  

  2501-25 
  

  

  2695-31 
  

  

  2882-61 
  

  

  3060-44 
  

  

  161-85 
  

  

  161-76 
  

  

  161-71 
  

  

  161-71 
  

  

  161-42 
  

  

  2463-66 
  

  

  2663-01 
  

  

  2857-02 
  

  

  3044-32 
  

  

  3221-86 
  

  

  164-56 
  

  

  164-64 
  

  

  164-68 
  

  

  164-51 
  

  

  164-52 
  

  

  2628-22 
  

  

  2827-65 
  

  

  302170 
  

  

  3208-83 
  

  

  3386-38 
  

  

  167-54 
  

  

  167-62 
  

  

  167-38 
  

  

  167-38 
  

  

  167-09 
  

  

  2795-76 
  

  

  2995-27 
  

  

  3189-08 
  

  

  3376-21 
  

  

  3553-47 
  

  

  170-54 
  

  

  170-39 
  

  

  170-34 
  

  

  170-27 
  

  

  

  2966-30 
  

  

  3165-66 
  

  

  3359-42 
  

  

  3546-48 
  

  

  

  This 
  tirst 
  group 
  consists 
  o£ 
  about 
  36 
  bands, 
  the 
  first 
  lines 
  

   of 
  which 
  respectively 
  have 
  the 
  following 
  frequencies 
  given 
  to 
  

   them 
  by 
  Dr. 
  Hasselberg 
  (Watts, 
  ' 
  Index 
  of 
  Spectra,' 
  p. 
  213). 
  

  

  15096 
  

  

  

  17080 
  

  

  

  18726 
  

  

  

  

  182 
  

  

  

  148 
  

  

  

  116 
  

  

  15278 
  

  

  

  17228 
  

  

  

  18842 
  

  

  

  

  180 
  

  

  

  147 
  

  

  

  113 
  

  

  15458 
  

  

  

  17375 
  

  

  

  18955 
  

  

  

  

  179 
  

  

  

  144 
  

  

  

  112 
  

  

  15637 
  

  

  

  17519 
  

  

  

  19067 
  

  

  

  

  178 
  

  

  

  146 
  

  

  

  111 
  

  

  15815 
  

  

  

  17665 
  

  

  

  19178 
  

  

  

  

  176 
  

  

  

  143 
  

  

  

  108 
  

  

  15991 
  

  

  

  17808 
  

  

  

  19286 
  

  

  

  

  174 
  

  

  

  143 
  

  

  

  109 
  

  

  16165 
  

  

  

  17951 
  

  

  

  19395 
  

  

  

  

  154 
  

  

  

  142 
  

  

  

  107 
  

  

  16319 
  

  

  

  * 
  18093 
  

  

  

  19502 
  

  

  

  

  155 
  

  

  

  139 
  

  

  

  105 
  

  

  16474 
  

  

  

  * 
  18232 
  

  

  

  19607 
  

  

  

  

  153 
  

  

  

  141 
  

  

  

  118 
  

  

  16627 
  

  

  152 
  

  

  18373 
  

  

  118 
  

  

  19725 
  

  

  

  16779 
  

  

  152 
  

  

  18491 
  

  

  120 
  

  

  

  

  16931 
  

  

  

  18611 
  

  

  

  

  

  149 
  

  

  115 
  

  

  * 
  Angstrom 
  and 
  Thalen 
  selected 
  18129 
  and»18251 
  as 
  heads 
  of 
  bands 
  

   in 
  place 
  of 
  these 
  two 
  lines. 
  But 
  there 
  is 
  overlapping' 
  here, 
  and 
  the 
  lines 
  

   given 
  above 
  make 
  the 
  most 
  regular 
  series. 
  

  

  