468 
DR. W. M. HICKS: A CRITICAL STUDY OF SPECTRAL SERIES. 
— 7^1 +'51 +10‘04^ +3‘42p = 0 or ?/ = 2'4 —'34^. In other words ?/ = 2, p = 1. This 
makes the limit of the second series less than that of the first by '17, in agreement 
with the relative values as actually found by direct calculation from the observed 
lines. Although therefore the limits suggest equality, there is good evidence that the 
observed difference, though small, is real, and is due to a displacement of two ouns. 
The sequence depends on an origin of 3667 + 49 = 37 I 6 A 2 . 
Rossi’s third series is (6) 28788'08, (2) 34087'11, (l) 36536'62, (l) 37869'0, the last 
being observed by himself. The first three give 
n = 40896'73-N/{m+'024118-'043614/m}" 
with 0 —C = — '36 for the last, probably excessive. The first line is the line adopted 
as one of the S] (2) group above, the third is F ( 4 ). I feel some doubt, therefore, as 
to these forming a real series, although the sequence has all the appearance of the 
s [m) type for these gases. The limit does not seem to have any relation to the 
doublet set. Its denominator is about 1*63. 
Table of Constants. 
Ne. 
A. 
.Kr. 
X. 
RaEm. 
•'l 
49-24 
179-50 
786-45 
1777-90 
5370-7 
V-i 
19-71 
75-60 
r 309-20 
\ 341-16 
1 815-05 
2649-53 
Ai 
666 
2519 
10969 
24893 
72820 
A 2 
267-708 
1057-057 
/ 4242-18 
\ 4678-80 
j 10998-14 
32166-44 
8 
14-47013 
57-9209 
249-536 
611-0100 
1787-024 
Ai/S 
46 
40| 
44 
0 
f 
40| 
A 2/8 
00 
00 
X ^ ^ 
1 
I 
18 
e 
191-5 
719-71 
3183-34 
7314-1 
23678-4 
u 
106-781 
439-47 
1884-03 
4133-18 
11191-8 
V 
106-861 
442-67 
1942-44 
4428-00 
13680-0 
S(^) 
f 52112 
\ 52403 
1 51731-05 
51651-29 
51025-29 
50403-00 
