Hinrichs on Dark Lines in the Spectra of the Elements. 33 
The intervals are not in any simple ratio, but closely approach 
to 1:2, yet the great range of this group does not authorize us 
to give great weight to it, 
Group IlI,d,—=-75. A very bright group of small range. 
L K, D. i C. 
4b 1533-1 , ‘ 33°2 +10 
4b S25 ye - 32:45 = "05 
4c 30°2 15 9 80°20 “00 
5e 207 iin i 28°70 00 
6c 22:7 22°70 00 
These errors are pesos within the errors of observation. The 
intervals seem to be rather irregular, but combining the first 
two we have 4:2: 8, 0 r2:1:4 The sa seein of such 
combinations will beisocntd apparent in the seque 
Group = d ==3°3, 
K. 
D : C, E. 
ad 1235-0 34° ar 
4c 29°6 ‘; : 29°6 0 
od nee ; 28:3 ‘0 
bd ae 24°4 sal, of 
ad OM x. Se : 21:8 42 
3c cS ee : 19°2 0-0 
5d 17:8 179 +l 
Group V, d 5 
K. D i C. E 
2¢ g049 895°4 + 
4b seo 30) : 84-9 0 
5b e995. 7g) ' 63-9 0 
3d 60-2 60-4 ey 
only having an error in the extremes. 
Group Mi 52-3. 
K. D i C. E. 
si 740°9 3 40°8 ses’ 
3b 36-9 vi : 36-2 Pa 
56 317 7 1 316 — ‘l 
26 29-0 99. 4 29°3 + °3 
2c i OP ie 201 0 
26 178 17-8 ‘0 
