The Magnetic Separation of Lines 25 
r i RASA? A 0% i Bir? A 
3166.48 |...... BOO ES Ente teas! chal sete 3111.09 Ags | IAG SY. Venheus ss dates 
6 GET ALL 6 Ege |e MOS ee 
3165.68 4 GU OF DSS i 3095.29 8 1.25 5X.25 
4 SAO eliaceas buete secs 8 76 
3164.54 12 1.09 11.10 3031.04 Beil tykerweco ne a srt ce 
6 40 4 2 {068i <lfevane panels 
3157.19 6 1.16 3 .42(?) 
3 81 2 
A simple multiple relationship between the components of a 
line appears for a great majority of these quadruplets. The inter- 
val .42 repeats itself very often in many lines, but the factors by 
which this interval must be multiplied in order to obtain the sep- 
aration of the lines are different, so that few duplicates occur. 
Some of these lines are evidently pairs. A well-defined line, 4455.08, 
the distance of whose components are three and one times the value 
.42, is accompanied on the red side by a weak line, the separation 
of whose components is three and two times the same value .42. 
The difference in vibration-frequency of these two lines is 2.62. 
Line 3663.81 is a duplicate of 4455.08, but is not accompanied by 
a weak line. There are two pairs of lines whose separations are 
in the ratio of three to one for the pair of greater wave-length and 
in the ratio of three to two for the pair of shorter wave-length. 
This first pair is 4312.47 and 4309.20, with a vibration difference 
of 12.21. The second pair is 3530.17 and 3514, with a: vibration 
difference of 123.95. One can associate with the last pair the 
very strong line 3505.67, whose components have the separation 
of four and one times the value .42. There appears also another 
pair whose components stand in the ratio of three to one and four 
to one times the value .42. These lines are 3364 and 3369.42 
which give a vibration difference 47.82. In the lines 3164.54 and 
3157-19 there exist possibly the ratios of three to one and three to 
two times the value .42 respectively. The vibration difference is 
73.46. These differences in vibration have no uniformity such as 
one expects in corresponding terms of similar series. It is possi- 
ble that the line 3999.18, the strongest line of the spectrum, and 
ey) ml 
=) 
