BAND OF AMMONIA, AND ITS OCCURRENCE IN THE SOLAR SPECTRUM. 361 
Table III.—Series b l of the Central Maximum. 
A, I.A. 
v, vac. 
di. 
d 2 . 
O-C.f 
3368-53 
67-38 
29678-18 
88-32 
10-14 
1-2 
o-oo* 
+ 0-31 
66-36 
97-31 
8-99 
1-0 
+ 0-41 
65-46 
29705-26 
7-95 
0-9 
+ 0-35 
64-66 
12-32 
7-06 
0-8 
+ 0-22 
63-95 
18-60 
6-28 
0-7 
+ 0-11 
63-32 
24-16 
5-56 
0-6 
o-oo* 
62-76 
29-11 
4-95 
0-5 
-0-03 
62-26 
33-53 
4-42 
0-7 
+ 0-04 
61-84 
37-25 
3-72 
0-5 
-o-oi 
61-47 
40-52 
3-27 
0-5 
+ 0-03 
61-16 
43-27 
2-75 
0'5 
+ 0-03 
60-90 
- 45-56 
2-29 
0-3 
o-oo* 
60-68 
47-51 
1-95 
0-2 
+ 0-02 
60-48 
49-28 
1-77 
0-3 
+ 0-18 
60-31 
50-78 
1-50 
0-4 
+ 0-37 
60-19 
51-84 
1-06 
0-3 
+ 0-34 
60-10 
52-64 
0-80 
0-3 
+ 0-24 
60-04 
53-17 
0-53 
o-oo* 
* Used in calculation of constants, 
t O - C is expressed in wave-number. 
Comparison ivith the Solar Spectrum. 
Details of the comparison with the solar spectrum are included in the general 
catalogue of ammonia band lines given in Table V. To facilitate the comparison, the 
wavedengths of the ammonia lines have been corrected to the scale of Rowland by 
the addition of 0'14A, as shown in the fifth column. The entries under “sun” are 
taken directly from Rowland’s table, and in the densest region of the central 
maximum, extending from 3363’5 to 3358‘0, the solar lines have been tabulated in 
3 B 2 
