950 
EEV. T. R. ROBINSON ON SPECTRA OF ELECTRIC LIGHT. 
Table I. — Aluminium, 
Air. 
Nitrogen. 
Oxygen. 
Hydrogen. 
Carb. oxide. 
C.P. 
E. 
C.P. 
E. 
C.P. 
E. 
C.P. 
E. 
C.P. 
E. 
1. 
32 « 
39 
39 
39-5 vf. 
38-7 * 0 . 
38-8 f. 
2. 
■a 
40-7 c. 
40-5 nc. 
40-9* 
3. 
43-6 f. 
43-4 c. 
43-6 f. 
42-8 * 0 . 
4. 
n 
46-8 f. 
46 nf. 
47-4 f. 
45-5 f. 
48 f. 
5. 
/3' 
48-8, 
48-5=1= 
49-4* 
49-8 f. 
6. 
51-5 f. 
52 f. 
51-3 f. 
52 f. 
7. 
■7 
55 « 
56-5 vf. 
55 
56-4 b. 
54 f. 
55-5 b. 
8. 
32 
57-7 vf. 
57-7 f. 
9. 
33 
0-3 vf. 
1-3 vf. 
59-5 nf. 
1-5 f. 
59-5 f. 
59-3 
1-7 
10. 
2-6 c. 
2-5 nb. 
3 f. 
2-5 f. 
11. 
S 
4 # 
3 * 
3-4 vn. 
3-3 b. 
3-2* 
12. 
5-4 bn. 
6 c. 
6-8 f. 
5-5 f. 
6 
13. 
7-3 f. 
7-5 wb. 
7 wf. 
7-9 vn. 
7-5 b. 
8 c. 
then 4 -vn. 
14. 
£ 
9-4 vb. 
8-5 b. 
15. 
s' 
b. 
10 b. 
10-4 f. 
11 f. 
10-4 
11-4 
nf. 
16. 
i" 
12 
b 
12-3 bn. 
12 c. 
13 nb. 
13-4 b. 
12-7 f. 
12 f. 
13-5 f. 
17. 
14 f. 
15 
theii3vn. 
18. 
16 1 nb. 
18 J nb. 
|l7 vf. 
17-5 w2. 
1 6-5 wf. 
17-4 b. 
18 b. 
18 f. 
18 f. 
two. 
19. 
20 vf. 
20 f. 
20 f. 
19-7 f. 
21 f. 
20. 
22-7 vf. 
23-4"! 
22-1 f. 
21. 
n 
24-4=1= 
24-2 *w. 
24-5* 
23-5 « 
24-4 
24 * 
24-1 c. 
23-3 b. 
23 b. 
23-5 b. 
1 f. here. 
f 
22. 
27-4 vf. 
....... 
26-4 J 
26-4 f. 
25-2 b. 
28 
23. 
{ 
31- 8 n.vb. 
32- 8 vn. 
|31 vf. 
30-5 vTib. 
29 w'^f. 
32-4 c. 
30 b. 
30-8 c. 
30-2 b. 
31 f. 
24. 
6 
34-1 
33 * 
35 f. 
34-4* 
33-4* 
33 * 
34 f. 
25. 
36-8 
b. 
37 b. 
37-5 c. 
37 4 c. 
35-8 b. 
36-8 b.vn. 
35-7 e. 
26. 
39-4 
b. 
39-5 vf. 
38-5 b. 
39 c. 
27. 
41-4 
b. 
41-5 vb. 
41 nc. 
41-4 b. 
42 c. 
40-6* 
40-8 * n. 
41-5 
43 
28. 
45-41 
bn. 
44-2 wb. 
45 I * 
44-5 bw*-* 
45-4 f. 
45 b. 
45-8 f. 
45-8 f. 
29. 
47-4 J 
bn. 
46 J * 
30. 
49-31 
49 1 f. 
48-9 f. 
49 
31. 
51-5 f. 
50-5 If. 
50-5 cn. 
51 b. 
49-8 f. 
32. 
t 
52-6* 
53-5 vf. 
53-5 J f. 
52-4* 
52 c. 
52 c. 
53 b. 
33. 
54 vnc. 
54-4 c. 
54 c. 
54-8* 
34. 
K 
56-6* 
55-5 f. 
55-5 * 
55 b. 
56-4* 
55 b. 
56 
55-3 f. 
56-8 f. 
double c. 
35. 
33 »' 
57-6 * 
58 * 
58-1 f. 
58-5 b. 
58-2* 
59 b. 
36. 
34*" 
0 * 
0-7 f. 
59-4 = 1 = 
1 b. 
0-4 f. 
59-8 f. 
37. 
2-6 
nc. 
1-5 1 f. 
1-5 b. 
1-7 f. 
38. 
X 
4-6 
nb. 
3-5 Ic. 
3-6 "j c. 
3 f. 
40. 
6-2, 
nc. 
5-5 J f. 
4-9 1 c. 
many 
here n. 
6 b. 
41. 
8-5 wb. 
7-5 
8-9 
9 b. 
7-8 J c. 
7-3 
42. 
10-5" 
* 
10-5 I b. 
10-1 b. 
10 f. 
43. 
12-4 
lb. 
11-5 lb. 
14 J f. 
11-4 
10-8 c. 
12,8 f. 
44. 
14 . 
b. 
13-5 f. 
14 b. 
13-9 b. 
13-4 c. 
13 b. 
45. 
{ 
15-41 
18 
) 
17 n. 
16-9 c. 
16 b. 
16-7 f. 
16-51 b. 
46. 
y 
20 vb, 
19-7 WC. 
20 c. 
20 b. 
19-4* 
19-3* 
19 8 c. 
18-8 fb. 
18 b. 
47. 
21-9 f. 
21-4 f. 
21 b. 
21 J c. 
48. 
26-2 f. 
27-9 f. 
26-5 
25-4 b. 
25-8 
26-3 f. 
25-3 b. 
25 c. 
49. 
1 
30-1 * 
30 * 
28 b. 
29-4 f. 
28 b. 
29-5 
28-2 f. 
50. 
33 f. 
34 f. 
34 nc. 
34-4* 
34 b. 
32-4 f. 
34-3 £ 
34 f. 
32 f. 
51. 
52. 
36-6 vf. 
36-5 c. 
0 
DO O WC. 
41 f. 
40-5 f. 
38 f. 
43 f. 
38 f. 
38-2 vf. 
40 f. 
42-4 f. 
416 vl. 
43 f. 
54. 
55. 
56. 
41-9 f. 
48-2 f. 
48 f. 
48-4 f. 
45 f. 
47 c. 
51 f. 
48 f. 
55 f. 
52-1 c. 
57. 
57-4 vf. 
57 f. 
69 f. 
The first of these, air, C.P., was taken with Duboscq, and after the telescope had been 
improved ; when first taken it showed only twenty-five lines, of which the groups ^ and 
X were seen as broad bright bands. Air R. was taken at the same time, the othei’s, 
