ON THE MEASUREMENTS OP WAVE-LENGTHS. 
109 
The Spectrum of Silver. 
Scale- 
numbers. 
Description of lines. 
Wave¬ 
lengths. 
Remarks. 
86-39 
Faint, short. 
3541S 
101-42 
Faint, short. 
3404-2 
103-06 
Faint, short. 
3398-7 
103-94 
Very strong, sharp, continuous, much 
extended . 
3382-3 
107-49 
Faint, short, nebulous. 
3351-8 
Coincident with Sn. 3351"8 
112-47 
Faint, short. 
3311-6 
113T5 
Faint, short. 
3306-1 
113-85 
1 Double, two similar lines, faint and f 
3300-6 
114-05 
J short \ 
3299-0 
114-89 
Faint, short, nebulous. 
3292-3 
115-35 
Faint, short, nebulous. 
3288-6 
11645 
f Very strong, forming a pair with 
J previous strong line, with which 
; it is similar in character but a 
little stronger. 
3280-1 
117-30 
Faint, short, nebulous. 
3272-8 
118-47 
Faint, short, nebulous. 
3265-2 
119-03 
Faint, short, nebulous. 
3260-2 
120-05 
Faint, short, nebulous. 
3251-8 
12T10 
Weak, short. 
3243-8 
122-69 
f Faint, short, nebulous. 
3231-8 
123-13 
\ Faint, short, nebulous. 
3228-6 
123-95 
Faint, rather longer than foregoing, 
nebulous. 
3222-3 
124-81 
Faint, short, nebulous. 
32160 
125-89 
Faint, short, nebulous. 
3208-1 
127-16 
Faint, short, nebulous. 
3198-8 
128-30 
Faint, short, nebulous. 
31906 
129-30 
Faint, short, nebulous. 
31837 
All the foregoing short lines except 
129-96 
Faint, short, nebulous. 
3179-2 
the first really form a group of 
130-70 
Faint, short, nebulous. 
3174-3 
lines remarkably similar in 
136-40 
Very faint, short. 
3134-9 
character, and for the most 
137-25 
Very faint, short. 
3129-2 
part equi - distant from one 
168-50 
f A triplet of short lines, the least re-1 
2937-4 
another. 
169-30 
frangible being weak, the other > 
2933-5 
170-17 
two fairly strong 
2928-2 
171-75 
Weak, short. 
2919T 
175- 025 
176- 075 
| A pair of fairly strong short lines . | 
2901-6 
2895-6 
180-44 
Fairly strong , short. 
2872-7 
191-82 
Fairly strong, short. 
2814-5 
1 There are 7 or 8 very faint nebulous 
195-03 
Fairly strong, short. 
2798-9 
J dots between these lines too 
201-81 
^Strong, short, sharp, fine, much ex- 
faint to be measured. 
tended. 
2766-4 
204-20 
Strong, fine, shorter and less ex- 
tended . 
2755-5 
207-06 
yFaint, very fine, short. 
2742-9 
211-96 
Very faint, short, very fine .... 
27206 
214-22 
Strong, short, broad, much extended . 
271U3 
221-20 
Fairly strong, short. 
2680-5 
226-27 
f Strong, short, extended, fine, sharp . 
2659-6 
227-08 
\ Weak, short, fine. 
2656-2 
234-10 
234-77 
| Pair of short fine lines.| 
2627-3 
2625-2 
