FOR KIRCHHOFF’S SPECTRAL LINES. 
51 
Conversion of Kikchhoff’s Spectral Measures into Wave-Lengths in terms of the Milli- 
metre, for the lines produced by Metals and Air. 
(The lines marked with an asterisk appear to coincide with dark lines in the Solar 
Spectrum.) — Note by Kiechhoff. 
Kirchhoff’s measure. 
Wave-length, 
0-000 
Kirchhoff’s measure. 
Wave-length, 
0-000 
Ce 
(La, Di) 
1190-1 
56345 
1 
1025-0 
58693 
1 
1249-9 
55611 
1 
1064*5 
58080 
1 
1256-7 
55530 
1 
1066-1 
58058 
1 
1329-1 
54710 
2 
1071*1 
57979 
1 
1332-4 
54676 
2 
1075-6 
57915 
1 
1336-2 
54635 
1 
1077-0 
57895 
1 
1385-0 
54118 
2 
1092*1 
57674 
2 
1401-7 
53948 
2 
*1302-0 
55012 
1 
*1438-9 
53580 
3 
*1303*4 
54995 
2 
1460-9 
53363 
1 
1317-6 
54836 
1 
1517*9 
52834 
3 
1345*4 
54537 
1 
from 1571-0 
52364 
1 T 
from 1486-8 
53121 
1 2 
to 1572-4 
52351 
j 1 
*to 1489*2 
53098 
J 
1573-0 
52345 
2 
*1622-3 
51925 
1 
1623-1 
51918 
1 
*1623*3 
51916 
1 
from 1629-2 
51866 
1 2 
1716*6 
51167 
2 
to 1630-4 
51858 
1728-8 
51072 
2 
1683-1 
51427 
1 
from 1894*5 
49873 
1 2 
1725-5 
51098 
1 
*to 1895*2 
49869 
J 
*1777-5 
50705 
2 
1903-0 
49816 
1 
from 1782*4 
50669 
I j 
1940-2 
49569 
1 
to 1784*5 
50650 
j 
from 1988-6 
49255 
hi 
1938-8 
49579 
2 
to 1989*5 
49250 
j 1 
2052-3 
48856 
1 
2003*8 
49156 
1 
2221-5 
47871 
1 
2004-7 
49151 
2 
2031-0 
48987 
2 
Di 
2081-0 
48682 
2 
1225-0 
55908 
2 
2121*4 
48444 
1 
1230-0 
55847 
1 
2208-2 
47948 
2 
from 1364-5 
54335 
1 , 
2214-5 
47912 
2 
to 1365*2 
54327 
| 1 
2217*8 
47894 
2 
1431-9 
53648 
1 
147M 
53269 
1 
Pd 
from 1518-6 
52828 
I ! 
1114*7 
57349 
1 
*to 1519-4 
52820 
j 1 
*1146-2 
56921 
2 
1536-0 
52675 
1 
1164-9 
56670 
2 
1541-4 
52622 
1 
1185*6 
56403 
1 
1548-9 
52555 
2 
1264-6 
55438 
2 
*1567*5 
52392 
1 
1269*0 
55386 
2 ■ 
1709*2 
51224 
2 
1279-1 
55270 
1 
from 1400*0 
53965 
1 » 
La 
*to 1400-7 
53959 
j 
from 1411-6 
53851 
1 2 
1430-1 
53666 
1 
*to 1412-8 
53839 
i 2 
1447-0 
53504 
1 
1416-8 
53798 
2 
1477*0 
53212 
1 
1451-0 
53462 
1 
1495*2 
53042 
3 
1606-8 
52056 
2 
1540-0 
52636 
1 
1627*9 
51878 
2 
from 1566-5 
52401 
1 * 
1634-8 
51821 
2 
to 1567-1 
52396 
1 2 
2136*8 
48352 
1 
1601-4 
52103 
1 
