~ 
erro 
mating the degree of reliance to be placed upon wave 
212 W. Gibbs on the wave lengths 
TABLE XI (continued). 
HA A CoBALT 
1231-3 1261 559-06 559:14 —0-08 K oS ee 
1239:9 1276? 558-01 557-49 —0-48 889°9 844 612-75 612-62 +018 
1352-7 140 4-64 40°29 1354°6 1401 544-74 644 0-20 
367 13 543-34 543-37 —0-03 1424 537-25 587-50 —0-26 
1372-6 1421-5 542°%4 642-78 —0-04 1429°8 1491 536-65 536-79 —0-14 
1380 1:89 541-73 +0°16 143 6 586-32 536-34 —0-02 
1384-7 1488 641-44 54139 +0°-05 1438-9 1500-5 535-72 535°75 —0-03 
139 445 78 54080 —0.02 1440-2 1501°5 535°59 535-66 —0-07 
1397°5 1456 0-07 539-86 +021 144 51 4°71 634-74 —0-03 
1401-6 1459-5 539°63 539-55 +0-08 1510-3 1584 528-55 528-60 —0-05 
14215 1 T51 537-67 —0-16 152 2 527-20 527-17 - 003 
1485°3 537-32 537-28 +0-04 1527-7 1604 526-96 627-01 —0-05 
1425-4 1486-5 537-11 537°18 —0-07 15665 1642 6523-86 523-94 
1527-7 16 98 527-09 —O-11 1572 50 523-46 523-31 40-15 
1569°6 1645 52363 523-10 —0-07 159 0 521:63 521-73 —010 
15772 1653 523-07 523-09 —0-02 2071-3 2186 487-19 487-29 —0-10 
16223 1696 519-62 519-70 —0-08 2103 2236 484-66 484-48 +018 
1623-4 1698 519:53 519°55 —0-02 2132-3 2286 482-00 481-80 +020 
1653-7 1728 517-31 517-25 +006 2157 2825 479-76 479-70 +0" 
1655°6 1731 517-16 517-03 +0-13 
1693-3 1767 514-47 514-83 +0-14 ZINO. 
1701-8 1775 513-87 513-74 40-13 ae 8 HA A 
96 36 49611 496°05 +0-06 "TLS 696 636-99 637:37 —0:33 
2001-6 2092 492-76 492.65 +0°11 9 855 610-64 610-°89 —0°25 
20 98 499-27 492-30 —0-03 1004 1001 589-90 58990 0-00 
2041-3 2147 489-42 489-47 —0-05 2240 2469 472-95 471-98 +027 
2886-4 3272 440-85 
8 ; 440-81 +0-04 
28223 3341 438-61 438-55 40-06 LEAD. 
K HA A 
1213 1240 561°29 561-46 —O17 
1419°5 1479 637-71 53735 —014 
329 439-07 438°93 +014 
or to large differences. Secondly, the measurements will, othet 
things being equal, be most accurate in the case of the lines 
insignificant source of error is thus introduced. In eth 
