ON THE MEASUREMENTS OF WAVE-LENGTHS. 
137 
The Spectrum of Mercury (continued). 
Scale- 
numbers. 
Description of lines. 
Wave¬ 
lengths. 
Remarks. 
195-17 
Weak, continuous, nebulous, faint in 
centre. 
2798-5 
196-96 
Weak, continuous, fine, faint in centre 
27900 
200-48 
Faint, discontinuous, nebulous . 
2773-2 
203-09 
Weak, fine, discontinuous. 
2760-8 
205-06 
Fairly strong, fine, continuous . 
2751-5 
216-26 
Faint, nebulous, discontinuous . 
27020 
226-66 
i 
Weak, discontinuous, nebulous . 
2657-6 
227-97 
Strong, vert broad, nebulous . . . 
2652-2 
229-79 
Faint, nebulous, discontinuous . 
26446 
230-77 
Faint, broad, nebulous, discontinuous . 
2640-6 
240-37 
Fairly strong’, fine, discontinuous . 
2602-3 
245-21 
Faint, discontinuous, fine. 
2584-2 
247-46 
Faint, continuous, nebulous .... 
25753 
258-20 
J 
' V ery strong,sharp,continuous, extended 
2535 8 
258-75 
Strong, nebulous, continuous 
2533-8 
261-88 
Very faint, discontinuous, nebulous 
2522-7 
264-20 
Very faint, discontinuous, nebulous 
25/4-3 
270-83 
Strong, fine, continuous, weak in 
centre. . . 
2491-4 
273-64 
1 
Faint, continuous, broad, nebulous . 
2484-2 
274-85 
1 
Very faint, discontinuous, nebulous 
2477-7 
277-85 
1 
Faint, discontinuous, nebulous . 
2468-0 
278-16 
Faint, discontinuous, nebulous . 
24670 
279-15 
Faint, discontinuous, nebulous . 
2463 7 
280-53 
Very faint, discontinuous, nebulous 
2459-3 
294-79 
J 
’ Strong, continuous, fine, weak in centre 
24/4-3 
297-07 
Strong, continuous, fine, weak in centre 
2407-3 
302-78 
Very faint, continuous, nebulous . 
2390 0 
314-84 
Weak, continuous, nebulous .... 
2355-2 
319-38 
Very faint, continuous, nebulous . 
23422 
320-20 
Very faint, discontinuous, nebulous . 
23400 
329-21 
Very faint, continuous, nebulous . 
23152 
336-25 
Very faint, continuous, fine .... 
2296-5 
337-74 
Very faint, continuous, nebulous . 
22926 
348-65 
fFairly strong, continuous, fine, weak 
in centre . 
2264-2 
349-27 
Fairly strong, continuous, fine, weak 
in centre. 
22633 
350-00 
Strong, nebulous, continuous . . . 
2261-4 
353-00 
Strong, fine, continuous. 
2254 0 
362-28 
Very faint, fine, continuous .... 
22310 
364-51 
Strong, broad, nebulous, continuous . 
2225 7 
379-09 
Very faint, fine, continuous .... 
2190-9 
398-45 
Very faint, fine, continuous .... 
2148-0 
MDCCCLXXX1V, 
T 
