212 
PROFESSORS G. D. LIVEING AND J. DEWAR ON 
List of ultra-violet iron lines—(continued). 
6s 
2731-5 
6s 
2764-7 
6 a s 
2803-2 
6 a 
4 s 
2848-0 
5 as 
2894-0 
6s 
2732-5 
6 s 
2765-3 
6s 
2803-8 
6 as 
2848-2 
5 a 
4 5 
2894-5 
2 a 
4 s 
2733-1 
6 a 
2766-8 
6 a 
5 s 
2804-2 
6s 
2849-3 
5 s 
2896-7 
6 a 
2733-7 
3 a 
1 s 
2767-2 
6 s 
2804-9 
6 5 
2855-3 
6 a 
2897-8 
6 a 
2733-9 
6 a 
4 s 
2768-8 
6 s 
2805-4 
6s 
2856-7 
5 a 
2898-9 
3 a 
5 s 
2735-0 
6 a 
4 s 
2769-1 
3 a 
(3 s 
2806-7 
4 s 
2857"9 
5 a 
2900-8 
5 a 
1 s 
2736-5 
6 a 
2769-4 
6 a 
2807-9 
6 a 
2858-3 
5 a 
2901-3 
3 a 
6 s 
2736-9 
6 a s 
2770-3 
6 a s 
2809-7 
6s 
2860-9 
6 5 
29C2-1 
las 
2739-1 
6s 
2771-1 
6s 
2810 9 
6s 
2862-1 
- 6 a 
2903-5 
5 s 
2741-1 
2 a 
5 s 
2771-9 
6 a 
2811-7 
6 a 
2862-4 
6 a s 
2905-8 
1 a 
5 s 
2712-0 
6 a 
2773-1 
6 s 
2812-2 
4 a 
2863-1 
6 a s 
2907-1 
3 a 
2s 
2742-8 
6 a 
5 5 
2774-5 
2 a 
4 s 
2812-8 
4 a 
2863-8 
6 a 
2908-2 
6 a 
2743-3 
6 s 
2776-1 
6s 
2813-4 
6 5 
2864-7 
6 a 
2908-9 
3 a 
5s 
2743-7 
6 s 
2776-9 
6 a 
2815-1 
5 a 
2866-2 
6 s 
2910-5 
5 a 
2744-2 
6 s 
2777-7 
6 as 
2817-0 
6 5 
2866"5 
1 a 
6 5 
2911-5 
2 a 
3s 
2746-1 
4a 
5 s 
2777-9 
6 as 
2819-0 
6 a 
2867-1 
6 a 
29136 
2 as 
2746-6 
6 a 
2778-3 
6 a 
2820-4 
6 a 
2868-0 
5 a 
6 5 
2917-4 
1 a s 
2749-0 
6 a 
2 s 
2778-9 
3 a 
6 s 
2822-9 
3 a 
6 5 
2869-0 
6 a 
2920-0 
2 a 
5 s 
2749-8 
5 a 
6 s 
2781-6 
6 a 
2823-9 
6 s 
2870-7 
6 s 
2921-5 
6 a 
2750-6 
Is 
2783-4 
3 a 
6 s 
2825-1 
4 a 
5 5 
2872-0 
6 a s 
2922-8 
5 s 
2750-8 
6 a 
2784-2 
6 s 
2827-0 
4 5 
2873-0 
6 a 
2923-2 
6 s 
2752-1 
3s 
2785-1 
6 a s 
2827-3 
3 a 
2873-6 
6 a 
2924-7 
6 a 
Is 
2753-0 
1 a 
3s 
2788-0 
6 a 
5 s 
2828-3 
6 a 
5 5 
2874-9 
6 a 
2925-2 
6 a 
2753-5 
6 a 
2789-5 
2 s 
2831-0 
6 5 
2876-4 
6 a 
2 s 
2926-0 
6 a 
2753"9 
6 s 
2790-3 
3 a 
6 6* 
2831-8 
4 a 
2876-8 
1 a 
4 -s 
292S-3 
6 a 
2754-3 
6 a 
2791-5 
5 a 
2832-4 
4 a 
2878-2 
6 5 
2931-1 
1 as 
2755-5 
6 a 
2792-2 
5 a 
2832-8 
6 a 
5 .s 
2880-4 
5 a 
6 5 
2932-4 
3 a 
2756-2 
4 s 
2793-3 
3 s 
2835-2 
6 a 
4 5 
2883-3 
1 a 
5 s 
2936-4 
6 s 
2756-9 
3 a 
2794-5 
6 s 
2836-7 
6s 
2885-5 
5 a 
2937-3 
4 a 
2757-2 
6 s 
2796-3 
5 a 
6 s 
2837-7 
6 a 
2885-8 
4 a 
6 5 
2938-7 
6 a 
2759-7 
5 as 
2797-4 
6 a 
2839-6 
6 a 
2887-3 
6 a 
2939-9 
3 as 
2761-7 
3 a 
2797-9 
6 a 
3 s 
2840-3 
6 s 
2887-6 
2 a 
2940-8 
4a 
2761-9 
6 a 
4 s 
27SS-8 
6 as 
2843-1 
6 a 
2889-2 
6 a 
2943-1 
6 s 
2762-4 
6 a 
2799-4 
2 a 
4 s 
2843-6 
6 a 
2891-2 
6 a 
2 5 
2944-0 
4 a 
2763-0 
6 a 
2800-1 
5 a 
4 s 
2845-3 
6 a 
2S92-0 
6 a 
2944-6 
6 & 
2763-6 
3 a 
2800-8 
6 a 
2846-5 
6 a 
2893-2 
U 
2947-3 
6 a 
2764-0 
6a 
2801-8 
The accompanying map is drawn to a scale double that of Angstrom’s and Cornu’s 
maps of the solar spectrum. Those lines which are common to both arc and spark are 
drawn right across from top to bottom, while those which are in the arc only are not 
continued to the bottom, and those which are in the spark only do not begin at the 
top; so that the upper portion of the map represents the arc spectrum, the lower the 
spark spectrum, and they overlap in the middle. 
We do not pretend to say that every line in this map really belongs to iron, for com¬ 
mercial iron wire was used to produce it, and the map may therefore probably include 
lines of a good many metals, certainly manganese lines in the arc, but it will not the 
less serve the purpose for which it has been made, namely: for reference in determining 
the approximate wave-lengths of lines of any spectra. 
