954 
EEV. T. E. EOBINSON ON SPECTEA OE ELECTEIC LIGHT. 
Table III. (continued). 
Air. 
Nitrogen, 
Oxygen. 
Hydrogen. 
Carb. oxide. 
Spark C.P. 
J. 
C.P. 
C.P. 
E. 
C.P. 
E. 
C.P. 
E. 
C.P. 
E. 
C.P. 
E. 
33. 
O 
K 
55-3 b. 
double. 
55'8 * 
double. 
561 * 
narrow 
one here. 
55 5 # 
double. 
i 
34. 
58 
* 
57 J # 
57 vn. 
35. 
33*" 
58-5 b. 
59 # 
59 » 
58 * 
0 b. 
0 * 
59 
36. 
34 
M vf. 
1-5 
2 b. 
37. 
X 
4-2 vf. 
3-3 b. 
3 b. 
3 f 
38. 
6 
5 * 
7-5 
6 
5 f 
39. 
9-8 b. 
I"' 
8 1 f 
others ^ 
7 » 
40. 
10-8 I f. 
9 
b. 
10-8 
10-5 1 b. 
9-5 1 f 
10-5 Jf 
41. 
12-1 If. 
11 
b. 
11-8 b. 
12 Jb. 
11-5 [f 
42. 
14-4 J f 
14 
f 
14 b. 
14-5 f 
145 
13-5 J f 
13 b. 
13-5 b. 
. . 
43. 
44. 
V 
20 f 
16 
19 
C. 
f. 
17-8 b. 
19-8 f 
17 f 
19 5 c. 
20-5 
16 c. 
19 b. 
19 b. 
15-5* 
18-51 c. 
20-5 U. 
17 f 
45. 
some seen. 
22 
f 
22 f 
22 f 
23 J c. 
46. 
25 
b. 
24-8 f 
26 f 
25 f 
25 -5 b. 
47. 
29- 1 f 
29 
f 
27-8 b. 
28 f 
27-5* 
48. 
1 
31 
f 
30 b. 
29-5* 
49. 
50. 
51. 
52. 
34 
36 vf 
41 
f 
33 -3 f 
33-5 f 
33 f 
37 c. 
35 vf 
41 vf. 
35 f 
39-5 
36 c. 
39-5 vf. 
43-5 vf. 
53. 
46-5 f 
48-5 vf. 
These C.P. spectra are of very great splendour ; the ground, especially the green part, 
is far brighter than the preceding, and the lines are dazzling. The E, ones are on the 
whole faint. The first is a simple spark ( without jar) : it differs little except in brightness. 
The second, headed J, was obtained with two large jars having 8*5 feet of external coat- 
ing ; it was far more luminous, and showed eight more lines than the normal one, besides 
four at the violet end, which were measured, but not 
tabulated, as they were not seen in the other spectra. 
I was struck with the outline of this spectrum, 
which gives an idea that the red and violet rays are 
less abundant near the electrodes. [See p. 973.] 
Table IV. — Copper. 
Air. 
Nitrogen. 
Oxygen. 
Hydrogen. 
Carb. oxide. 
C.P. 
E. 
C.P. 
E. 
C.P. 
E. 
C.P. 
E. 
C.P. 
E. 
1. 
32 
37' 1 nc. 
36-5 » 
2. 
(X. 
38-2* 
38-5 b. 
38-3 b. 
38-3* 
3. 
of 
39-6 vb. 
40-5 f 
41-3 f 
40 * 0. 
39-8 o.b. 
4. 
43-5 f 
5. 
n 
47-8* 
46 b. 
48-3 
47-8 f 
6. 
/ 3 ' 
50 f 
49-5 f 
50-3 f 
50-3 f 
50-4 f 
49-5 * 
51-5 c. 
7. 
y 
54-2* 
53 
53-5 f 
54-8 vf 
55 '5 c. 
54-5 f 
8. 
57-5 c. 
56 * 
9. 
32 
59 f 
many here. 
58-5 f 
59-5 c. 
60-5 f 
59 c. 
58-5 f 
58-5 f 
10. 
33 
l-5f 
2 f 
1 » 
1-8 f 
{ 
0-8 I f 
2-6 If 
1 2-5 f 
11. 
4-1 * 
3-3 c. 
3-5 c. 
3-9 J f 
12. 
6 b. 
6-5 b. 
5 b. 
6-8 
7 b. 
5-8 
5-5 1# 
13. 
f 
8-4 » 
8-5 c. 
8-3 f 
about 30 
7-5 /* 
n here. 
