956 
EEV. T. E. EOBINSON ON SPECTEA OE ELECTEIC LIGHT, 
Table V. — Nickel. 
Air. 
Nitrogen. 
Oxygen. 
Hydrogen. 
Carb. oxide. 
C.P. 
e; 
C.P. 
E. 
C.P. 
E. 
C.P. 
E. 
ap. 
E. 
1. 
32 
33-9 vf. 
2. 
cc 
39 * 
38-4* 
38-5* 
38 vnfo. 
39-7* 
38-5 
3. 
a! 
40‘6 nb. 
40 
4. 
43 c. 
43-6 f. 
42 -vf. 
42 fo. 
41-5 vf. 
5. 
/3 
46 f. 
45-5 f. 
45-5 vf. 
46-5 fo. 
46 vf. 
6. 
?>' 
49 * 
48-1 * 
48 * 
48 5* 
48 
ovf. 
7. 
50-4') 
vf. 
49-5 nf. 
51 f. 
50-7 f. 
505 vb. 
51-4 
vf. 
8. 
52-2 f. 
52-7 vf. 
52-7 
vf. 
52 
9. 
y 
55 * 
55 * 
543 
, vf. 
55-5 f. 
54 vf. 
10. 
56-5 nb. 
56 
^vf. 
56-5 * 
57 
£ 
11. 
32 
60-2 vf. 
583 
vf. 
59 vf. 
59 f. 
59-7 vf. 
58- 8f. 
60 
£ 
593 
vf. 
12. 
33 
2 nb. 
2 nb. 
13j 
vf. 
3 bw®. 
2-5 f. 
3 
b. 
13. 
S 
4 =(= 
4 * 
5 -5 * 
3-7 n. 
4-5 J 
rb. 
5 
£ 
14. 
6 f. 
6 1 
f. 
6 cw. 
6-5 n. 
....•I 
6-5 > 
b. 
15. 
s 
8 b. 
O I V, 
7-2 e. 
8-7 vb. 
73 
7-7 f. 
8-5 
b. 
8 
* 
16. 
9-5 In. 
9-7 
f. 
b. 
9 
n. 
17. 
10-5 J nb. 
10 b. 
11 c 
10-5 c. 
10 vf. 
10-5 
>b. 
18. 
i" 
12 b. 
12-71 
f. 
12-5 
b. 
12 
vf. 
19. 
14-2 
14-7 
f. 
15-5 0. 
14 wf. 
14-2 wf. 
14-5 
b. 
triple. 
15-4 
^f. 
20. 
X 
16'2 bw^. 
17-2 bw<. 
17-4 
f. 
17-5 ; 
b. 
17 
21. 
19 bw. 
18-7 nc. 
19 c. 
19 wf. 
20-5 
b. 
21 
£ 
both 
double. 
22. 
23 * 
21-5* 
23 * 
22-5 
b. 
23. 
25 "1 vn.b. 
24-7 c. 
24-7* 
24-7 b. 
25 \* 
24. 
26 1 vn.b. 
26 Jn. 
25. 
28 ( vn.b. 
27-7 vf. 
29 f. 
28 vf. 
29-2 n. 
295 
f. 
26. 
30 J vn.b. 
30-2 nb. 
31-4 nb. 
30-41 
b. 
31-5 vf. 
315 
vf. 
31 
w®f. 
27. 
6 
32-5* 
321 nf. 
32-8 
b. 
32 f. 
32-2 n. 
32 
£ 
28. 
35 nb. 
34-7 n. r 
33-4* 1 
36-1 
b. 
36 nb. 1 
34 nf. 
36-5 
35 
vf. 
1 
36-4 f. / 
37 vn. J 
29. 
38 f. 
39-2 n. 
39-4 f. 
39-4 b. 
38-5 
39-2 nb. 
39 
vf. 
30. 
40 
40 b. 
40 nb. 
40-7 *w^. 
41 
vf. 
31. 
41-7 b. 
42-1 nf. 
42 * 
42-2 
41-5 w®. 
425* 
32. 
44 lb. 
45-4 \b. 
44-5 b. 
33. 
45 /b. 
45-2 b. 
46-7 Jb. 
45-4 b. 
46 vf. 
46 £ 
46 n. 
34. 
48 f. 
48-7 f. 
48 n. 
48-2 we. 
35. 
50 b. 
50-7 w. 
50-7 vf. 
50-7 b. 
50 * 
50 i). 
49-5 nc. 
49 
vf. 
36. 
1 
52 vf. 
53 nc. 
52-2 wc. 
515* 
37. 
K 
54'5 * 
54 nf. 
54-7' 
lb. 
54-5 * 
54 wb. 
535 £ 
38. 
55-5 * 
55‘2 w. 
56 * 
55-9 
fb. 
56-5 n. 
55-2 nb. 
56 * 
double. 
39. 
57 *w. 
57 * 
58 * 
58 n. 
40. 
33 
59 * 
59-2 wc. 
59 5 * 
41. 
34 
1 -lb. 
2-3 1 b. 
1-7 b. 
0-5 b. 
42. 
X 
3 Ic. 
2-2 
4-2 U. 
5 b. 
43. 
4 J c. 
5-9 J b. 
6 b. 
5-7 wc. 
6-5 * 
44. 
8 f. 
7-7 w. 
8-2 f. 
8-2 b. 
7-5 \ nb 
45. 
IO-5'I b. 
9-5 J nb. 
9 ] b. 
46. 
12 U. 
IM^f 
12 * 
12-7 wc. 
11 /b. 
47. 
ft." 
13 J b. 
14'7 n. 
14-7 f. 
14-lb. 
16 c. 
15 b. 
13 * 
48. 
17 f. 
17 f. 
18-3' 
nb. 
17-5 I * 
18 vb. 
17-4 wSf. 
171 b. 
17 
b. 
49. 
19 nb. 
19-3 f. 
20 
f nb. 
20 Jc. 
21-5 nc. 
~ 
1 8-7 wc. 
19 Vvb, 
50. 
V 
22-7 f. 
21-7 w. 
22-6 vf. 
23 vf. 

22 J b. 
22*5 vf. 
51. 
25 f. 
25-5 vf. 
25-5 * 
25 b. 
24-2 wc. 
— 
52. 
28’5 b.w'-*. 
27-5 vf. 
27-2 b. 
28 * 
53. 
i 
29'7 w. 
29-8 nb. 
29 f. 
54. 
32-5 f.w3. 
33-7 b. 
34-1 b. 
33 b. 
33 nf. 
31-2 vf. 
315 vf. 
55. 
0 
36-2 n. 
363 b. 
38 f. 
36 b. 
56. 
42-5 f. 
40 3 vf. 
403 vf. 
41 n. 
40 nf. 
425 c. 
57. 
44‘9 e. 
44-9 vf. 
43-5 c. 
45 c. 
58. 
47-5 f. 
47-9 
49-5 
f. 
47 b. 
47 f. 
49 vf. 
Ot). 
5 1 "5 vf. 
52‘1 c. 
Of these the spectra N were taken with Duboscq. 
The group 23-26, in air, C.P., is notable. In N, E., the remarkable set 7-12 were 
first recognized ; they are very faint, as broad as the slit, and spread over the orange 
and yellow. The groups 14—16 and 18—20 are peculiar. In O, C.P., there is scarcely 
any yellow, and the lines from seven to twenty-eight are very indistinct, from the 
brightness of the ground. 
