IN RELATION TO QUANTITATIVE CHEMICAL ANALYSIS. 
333 
The Copper Spectrum. 
Scale numbers. 
Wave-lengths. 
1 per cent. 
0'1 per cent. 
0-01 per cent. 
0-001 per cent. 
Hundredths of an inch. 
113-10 
3306-8 
3306-8 
115-10 
3289-9 
• 
f 117-25* 
/ 3273-2 
3273-2 
3273-2 
1120-7 
1 3246-9 
3246-9 
3246-9 
3246-9 
164-53 
2959-5 
190-13 
2823-2 
201-36 
2769-1 
2769-1 
211-8 
2721-2 
212-55 
2718-4 
2718-4 
213-7 
2713-0 
2713-0 
216-1 
2702-7 
216-58 
2700-5 
219-37 
2688-8 
2688-8 
224-7 
2666-7 
236-45f 
2617-8 
241-1 
2599-7 
241-58 
2598-3 
255-94 
2544-6 
2544-6 
260-25 
2528-8 
2528-8 
261-00 
2526-2 
266-77 
2506-2 
2506-2 
270-91 
2491-4 
271-65 
2489-1 
272-72 
2485-6 
276-45 
2473-2 
298-31 
2403-3 
299-4 
2400-1 
/ 309-17 
/ 2371-6 
2371-6 
{ 309-57 
\ 2370T 
2370-1 
336-8 
2295-0 
343-67 
2277-0 
f 355-27+ 
T2248-2 
2248-2 
J 355-5 
J 2247-7 
2247-7 
} 357-1 
] 2244-0 
2244-0 
[357-32 
[2243-5 
2243-5 
* This pair of lines differs from all others in the spectrum by not being shortened on dilution, but 
becoming attenuated till at last they disappear. They remain long lines till the last, 
f This is a “very fine and very long line. 
+ This group is distinctly seen to be composed of four lines in the photographs of the 3 per cent, 
solution, and some lines, to the number of four or five, more refrangible than these are visible 
