ar 
362 DR J. HALM ON 
11. Cadmium. 12. Mercury. 
1. Supsiprary Series (3rd Component). 
log a, =4°95111 —10 
1. Supsipiary Serres (3rd Component). 
log a, = 4°95027 —10 
= 42450: «= 46582°5 
log b, = 4°56211,,— 10 va eee log b, = 4:44885,, — 10 ‘ 
| | | Obs. — 
(m+p)| — v obs, v comp. nae K-R. (m + 4) v obs, vy comp. aan. K-R. 
3:0 | 29379°3 | 29379°3 00 | +01 30 | 336985 | 336968) +1:7 
4-0 | 352483 | 35248:3 0-0 | +05 40 | 394490 | 39447°5| 41:5 
5:0 | 37884:5 | 37884:5 00 | —41 50 | 42045:0 | 42048-9| - 3-9 
6-0 | 392945 | 39299°8/ -5:3 | +1-0 6:0 | 434480 | 434464] +1°6 
70 | 40137* | 401498: -5:8 | 45:3 f a 
2. Supsipiary Series (1st Component). 
log a, = 4°93417 —10 
» = 40765°7 2. Supsrp1ary Serres (1st Component). 
log b, = 492926, — 10 / 
; log a,= 494401 —10 Ae 
| a log b, = 4°84592,, — 10 oe 
(m+ p)| — v obs. v comp. oe K-R. 
Obs. — 
: ae (m+ p)| — v obs. compe Geant K-R 
2°55 19661°9 19661:0} + 0:9 | — 263: | 
B 5b i 307448 30746. be 17a ne Onl | 
4°55 34863°3 34862°9| + 04) + 0-2 2°45 18311°7 18311°7 0:0 = Nile 
5:b5 36864:0 | 36862°7) + 1:3) — 0:3 3°45 29924:'7 | 29923:9) +0°8 + O1 
6°55 87989:0 | 37989°3|} -— 0:3 ee 4°45 34182°3 34182°5| -—0:2 —~ OF 
7-55 38716°7 38688:3| +28-4 26°3 5:45 36234°2 36232°6| +1°6 - 06 
8°55 39141°0 | 39152:1) -11:1 6°45 37380°3 | 37380°3 0:0 =- $4 
| 
Turning to the elements of the 3rd column of MENDELEJEF’s series, we find Al, In 
and Tl each with two subsidiary series. I have mentioned already that unexplained 
anomalies exist in the first series of Al and the second series of Tl, and that neither 
Kayser’s formula nor the present one represents the observed lines in a satisfactory 
manner. Professor Kayser has nevertheless partly reconciled his formula with the 
observations by neglecting in each case the first three lines, and by demonstrating that the 
remainder could thereby be brought into fairly satisfactory agreement. It might be easily 
shown that under these circumstances our formula would render equally good service. 
But as long as the nature of these quite exceptional discrepancies is unknown, I consider 
such computations as being of little value. Iam inclined to think that the series referred 
to are not homogeneous, but are in fact the result of a superposition of several branches, 
perhaps two in each case, which coalesce in such a manner as to give the impression of 
one single series. We shall come upon such anomalous cases later on when treating of 
the band-series, where in at least one instance, viz. the cyanogen-band, the hetero- 
* Computed from the 2nd component : »=39594'5, 
