ON THE MEASUREMENTS OE WAVE-LENGTHS. 
Ill 
The Spectrum of Silver (continued). 
Scale- 
numbers. 
Description of lines. 
Wave¬ 
lengths. 
Remarks. 
313-88 
318- 93 
319- 42 
320- 47 
322- 81 
323- 35 
325-53 
325- 73 
326- 65 
327- 37 
328- 05 
328-59 
331-27 
336T3 
340-04 
342- 55 
343- 50 
344- 40 
352-96 
354- 95 
355- 90 
362-86 
372-73 
374-44 
381-21 
390-33 
392-33 
399-65 
412-05 
415-38 
Strong, short, extended, fine. . . . 
Very faint, fine, short. 
Very faint, fine, short. 
Very faint, fine, short. 
Very faint and short, fine . 
("Very strong, discontinuous, broad, 
J much extended, sharp on less re¬ 
frangible edge, and nebulous on 
[_ more refrangible side . 
^Double, consisting of a strong broadh 
nebulous, and a VERY strong fine 
line, nebulous on more refrangible 
side, but discontinuous and much 
b extended J 
Weak, short, fine . 
("Very strong, discontinuous, broad, 
< much extended, fine sharp on less, 
and nebulous on more refrangible side 
Faint, short, very fine . 
Very strong, discontinuous, much ex¬ 
tended, broad, sharp on less, and 
nebulous on more refrangible side . 
Weak, fine, short . 
Faint, very short, fine . 
Very faint, short, fine . 
Very strong, broad, short, sharp on 
less, and nebulous on more refran¬ 
gible side . 
Faint, very short, fine . 
Faint, very short, fine . 
Weak, short, very fine . 
f Pair of strong, broad, short lines, 1 
< sharp on less, and nebulous on > 
more refrangible side. J 
Fairly strong, broad, short, sharp on less, 
and nebulous on more refrangible 
side . 
J A pair of very faint and short fine 1 
L lines ./ 
Weak, short, fine on less, and nebulous 
on more refrangible side .... 
Faint, short . 
Very faint, and very short . 
Weak, short, fine on less, and nebulous 
on more refrangible side .... 
Very faint, short, nebulous .... 
Very faint, short, nebulous .... 
2358-1 
2343-7 
23421 
2339-2 
23325 
2331-7 
2325-8 
2325-3 
2322-3 
2320-6 
2319-5 
2317-4 
2310-1 
2296-8 
2286-7 
2280-7 
2277-8 
2275-3 
2254-1 
2249-9 
2247-6 
2230-6 
2206-0 
2202-0 
2186-0 
2165-8 
2161-3 
2145-4 
2119-0 
2112-0 
The strong lines of silver described as nebulous on the more refrangible side may 
be double, like those of copper, to which they are perfectly similar in character. 
There is, however, no appearance of their being double with the dispersion we have 
employed. 
