ON THE MEASUREMENTS OF WAVE-LENGTHS. 
97 
The Spectrum of Zinc (continued). 
Scale- 
numbers. 
Description of lines. 
Wave¬ 
lengths. 
Remarks. 
258- 42 
259- 17 
260- 85 
262-26 
264- 12 
265- 85 
267-95 
269-23 
269-34 
271- 10 
272- 44 
272- 70 
273- 10 
274- 43 
276- 56 
277- 70 
278- 38 
279- 40 
279- 88 
280- 37 
283-44 
286-02 
287- 29 
288- 51 
290- 73 
291- 91 
292- 75 
293- 35 
296- 69 
297- 71 
298- 79 
299- 81 
300- 60 
301- 68 
302- 76 
304- 79 
305- 30 
309- 10 
310- 43 
317T0 
317-79 
324-04 
329-30 
331-58 
347-76 
352-62 
402-91 
419- 05 
420- 04 
421- 51 
422- 95 
428-02 
431-87 
436-50 
439- 37 
440- 35 
460-30 
J Faint, very short. 
(_ Faint, very short. 
Strong, very short. 
Strong, very short. 
Stkong, very short. 
Stkong, very short. 
Very strong, broad, sharp, continuous, 
with a nimbus, extended .... 
Very faint, short. 
Very faint, short. 
Strong, short, nebulous. 
Strong, very short. 
Weak, very short. 
Faint, very short. 
Faint, very short. 
Weak, very short. 
J Faint, very short. 
\ Weak, very short. 
f Faint, very short. 
< Weak, very short. 
L Faint, very short. 
fWeak, very short. 
J Weak, very short. ....... 
] Weak, very short. 
L Faint, very short. 
f Strong, very short. 
J Weak, very short. 
| Faint, very short. 
LStrong, very short. 
Weak, very short. 
Weak, very short. 
Very faint and short. 
Very faint and short. 
Very faint and short. 
Very faint and short. 
Very faint and fine, rather long . . . 
Very faint and short. 
Very faint, fine, discontinuous . 
Very faint, short. 
Very faint, short. 
f Weak, very short. 
1 Very faint, fine, discontinuous . 
Very faint and short. 
Weak, very short. 
Weak, very short. 
Faint, very short, fine, sharp. 
Faint, very short, fine, sharp.... 
Weak, continuous, nebulous .... 
f Faint, discontinuous, fine. 
J Faint, discontinuous, fine. 
| Faint, continuous, nebulous .... 
[.Very faint, discontinuous. 
Faint, short, nebulous. 
Faint, short, fine. 
Very faint, short. 
f Faint, discontinuous, nebulous . 
\ Faint, continuous, nebulous . . . . 
Faint, continuous, nebulous .... 
2535 0 
2532-3 
2526-3 
2521S 
2514-7 
2508-7 
2501-5 
2497-0 
2496-5 
2490-4 
2485-9 
2485-0 
2483-7 
2479-2 
2472'2 
24683 
2465-9 
2462-8 
24613 
2459-8 
24500 
2441 6 
2437-7 
2433-9 
24270 
2423S 
2420-7 
2418-8 
2408-4 
2405-3 
2401-9 
2398-7 
2396-4 
2393-3 
2390-1 
2384-2 
2382S 
2371-7 
2367-8 
2348-7 
2346-7 
2329-3 
23150 
23088 
22670 
2255-0 
21385 
2104-2 
21020 
2099 0 
20959 
2085-4 
2077-6 
2068-4 
20628 
2060-8 
2024-2 
These lines appear as dots on the 
photographs. 
The lines more refrangible than 
this, described as very short, 
appear as dots on the photo¬ 
graphs. 
} 
Cornu measured this quadruple 
V group as a double line, X of the 
more refrangible line =2098"8. 
Cornu did not measure these lines. 
MDCCCLXXXIV. 
O 
