NICKEL UNDER MODERATE PRESSURES. 
365 
6. Results of Measurements. 
Two series of measurements have been made upon plates taken under total 
pressures of eleven and six atmospheres respectively. Those at the higher pressure 
are probably the more reliable. Since the absolute wave-lengths of the lines are not 
concerned in this work the numbers quoted are taken from the tables published by 
Exner and Haschek, and Hasselberg, and merely serve for purposes of identifica¬ 
tion. The wave-lengths are referred to Rowland’s system. 
Enhanced lines are indicated by the letter E. 
Table I. 
Wave-length. 
Intensity. 
Class. 
+ 10 atmospheres. 
+ 5 atmospheres. 
AA , 
lOOO A.U. 
No. 
of plates. 
aa 0 
10 00 A-U- 
No. 
of plates. 
3446-41 
6 
I. 
17 
1 
3453-06 
4 
I. 
13 
1 
— 
— 
3454-29 E. 
2 
IV. 
15 
1 
— 
— 
3458-62 
10 
I. 
18 
1 
— 
— 
3461-84 
10 
I. 
25 
1 
— 
3472-71 
6 
II. 
14 
1 
— 
3483-95 
6 
II. 
15 
1 
— 
— 
3493-13 
10 
I. 
15 
1 
— 
— 
3501-01 
3 
11. 
15 
1 
— 
— 
3510-52 
8 
I. 
22 
1 
17 
1 
3515-21 
10 
I. 
27 
1 
14 
1 
3519-90 
3 
II. 
19 
1 
10 
T 
3524-69 
15 
I. 
30 
1 
14 
1 
3528-10 
3 
II. 
18 
1 
— 
— 
3548-32 
3 
II. 
21 
2 
25 
1 
3561-92 
2 
I. 
11 
2 
— 
— 
3566•55 
10 
I. 
20 
2 
15 
1 
3572-06 
6 
II. 
18 
2 
12 
1 
3576-91 E. 
6 
IV. 
82 
i 
51 
1 
3588-07 
2 
II. 
14 
2 
— 
_ 
3597-86 
6 
II. 
21 
3 
— 
— 
• 3602-44 
9 
II. 
16 
3 
3609-49 
2 
I. 
16 
3 
— 
— 
3610-68 
4 
II. 
26 
3 
13 
1 
3612-91 
3 
II. 
16 
3 
14 
1 
3619-54 
15 
I. 
18 
2 
13 
1 
3624-89 
2 
I. 
7 
3 
— 
3635-07 
1 
III. 
51 
9 
— 
3662-11 
1 
III. 
35 
2 
— 
— 
3664-26 
3 
II. 
22 
3 
18 
1 
3669-39 
1 
II. 
12 
3 
— 
— 
3670-59 
2 
II. 
25 
3 
— 
— 
3674-29 
3 
II. 
19 
2 
13 
2 
3688-57 
2 
II. 
20 
3 
— 
— 
3694-07 
2 
III. 
25 
3 
— 
— 
3722-62 
3 
II. 
29 
3 
— 
— 
3736-96 
3 
II. 
10 
3 
— 
— 
3739-38 
2 
I. 
10 
2 
— 
— 
