282 REPORT—1 885. 
The Mercury Spectrum. 
Wave-lengths 
Scale numbers 
1 per cent. 0-1 per cent. 0:01 per cent. 
Hundredths of an inch 
74:6 3662'9 
1 75°37 {3044 
TT:37 3632°9 3632°9 
f 137-08 3130°4 
.137:95 3124:5 3130-4 
163°37 2966°4 2966°4 
185°45 2846°8 
258-75 2533°'8 2533'8 2533°8 
364°51 2225°7 
Scale numbers 
The Tin Spectrum. 
Wave-lengths 
0:01 per cent. 
1 per cent. 0-1 per cent. 
Hundredths of an inch 
62°40 3800°3 3800°3 
107°51 3351°8 33518 
110°25 3329°9 poago 
116-03 3282°9 3282-9 
11883 3261-6 3261°6 
130°7 3174:3 31743 
152718 3033°0 3033°0 
156°29 3007°9 30079 
173°05 2912:0 
176718 2895-0 
1778 2886°9 
18247 28620 2862:0 2862°0 
{800 {202 
187:01 2833'9 2833'9 
192:3 2812°5 2812°5 
198°28 2784-0 
199°34 2778°8 2778°8 
215°35 2705'8 2705'8 2705'8 
224-95 26642 
225°98 2660°6 
226°56 2657°9 2657°9 
229°67 2645-4 
230°23 2643°2 2643°2 
233717 2631°4 2631°4 
242-65 2593-6 
243°10 2591-7 
248-70 2570°5 2570°5 
255°45 2545-6 2545°6 
269°8 2495'0 
273°4 2482°9 2482'9 
289°95 2429°3 2429°3 2429°3 
292°37 2421°8 2421°8 
310-11 2368°3 
314°85 2355°0 23550 
321°94 2335°3 
328°34 2317°9 
355°83 2247-0 
