360 G. Hinrichs on Spectral Lines. 
Grovr II. d,—0-9=0"™-00000009. 
I K 
i w’ E 
4d 18370 5461°8 g 84613 2 5 
6c 18435 54545) 4541 HA 
Bd =ss1851'1 54453 9 4451 42 
5b 13527 = 5443-05 54433 8 
5b = «13629 «=  432°5 5 482° 0-0 
6d 18670 5428-2 , 54280 +2 
5b 486 «13726 = 422-0 9 EET 49 
4c 1380°5  5413°6 5 54136 0-0 
4e 1384-7 5403-9 , 54001 —2 
6c 1389-4 5404-4 1 $4048. 8 
5d =—s-1390°9 = 5403-7 g 5403-7 0-0 
Be 13975 5395-7 5 53056 1 
4e rea. ba9IO a 
4e 14105 = 58819 5, 2 58821 062 
6c 14215 — 5369°8 1; «(4586050 48 
5b = «1423-0 3685 3 $3686 —l 
5b 1425-4 5366-0 go. S0058 | 1 
5b = «1428-2 = «863-2 5363-2 0-0 
The agreement is very close. The intervals are apparently not 
very simple, but they give 
6°10 & 19 6 7°98 6 1 0 6.3014. 39 8 
_——_ 
—— — —— seyret: sites 
8 12° 12 ha 2 9 a8 10 616 15 6 
first multiple of 4 (viz. 8, 12, 12, 12) and in the latter half mul- 
tiples of 5 (5, 5, 10, 5, 10, 15). But we may also group these 
as follows: 
8 10 35 6 26 2400-6; 10: 16 8 
which are all, excepting extremes, multiples of 5; the extremes 
would by completion with adjacent parts not observed by Kirch- 
hoff no doubt complete the series. Dividing by the common 5 
we obtain the ratios ~ 
2 7 1 1 2 1 2 3 
which again may be combined as 
— 3 gaa oe 
To the common factor 5 above corresponds an interval of D,= 
5d,=4°5; to this further interval of 8 such corresponds an in- 
_ terval of D,’=3x5d,=15d,=185. Both of these numbers 
have theoretical importance, 
