37 
The translation 6923.26 yields the formula: 
109675.0 
« + 1.384406 + 446.70 2—1)2 
LOS ao? 50748960 — 
gol 2 
Ix | 3 a Limit : 
x Aw Ab Aw—Ab ae Errore Intensity 
1 3009. 24 3009 . 24 0.00 | 0.05 50 
2 2380.82 2380.83 —0.01 0.05 1 
3 2199.46 2199.42 +0.04 0.10 -- 
4 2118.43, which we found for «= 4 and the following lines have 
not been observed. Possibly their intensity is too slight. 
These two groups of translation series are represented on the 
annexed plate, arranged in succession according to the vibration 
frequencies of the first lines of these series. The figures mean: 
freq. > 10°. The arrow indicates the limit of the region of observation. 
The first line in the fourth red series for Tin must be dotted. The six 
series that were treated first, have been indicated by the same colour 
(viz. red), in the same way the three last by black. The succession 
evil, bte vel TE SROUX TVS = Vy. MI 
Not until further investigations on the Zseman-effect have been 
carried out, will it be possible to determine further what place 
these series occupy in the whole system. In the arec-spectrum of 
Tin there are further indications for series, which have, however, 
not yet been examined by me. 
In the spectrum of Antimony I have found a series which has as 
formula: 
109675.0 
108 Al = 45365.69 — 
(a + 1.568667 + 237,63 A—1)2 
(eae | os 
X me 
x hp 2 hed | op aint, | Intensity 
1 | 3383.24 | 3383.24 0.00 0.03 8 
2 | 2692.35 | 2692.35 0.00 0.03 3 
3 | 2480.50 | 2480.50 0.00 0.03 2 
4 | 2383.731)| 2383.93 | —0.20 0.03 24 
5 5. 2330.95 a ae is 
1) EXNER 
and HascHex |.c. 
