452 J. C. Draper—Dark Lines of Oxygen in the Solar Spectrum. 
2d. The solar spectrum shows faint dark lines in the region 
about 44317 and 44319. 
3d. Oxygen is the substance which can produce dark lines 
in this region, therefore we must attribute them to the presence 
and action of that element. 
: Solar Spectra. Oxygen Electric Spectra. EB 
e/ 3 5 Be | zs 
$4.5 1.5 Bt. 8 8 Sibwie | Bd bee 
BM og = 3 HB} Sf |) 88 |S |] & | gz 
2a ale ee ee aS Pee pa tsa oe ke 
ee ee oe a a 
ocd 4a 
4312-85)4312°84 | 4312°851/4312°854 
Ti -67| 13°48| 13°607] 13-409 : 
Fe| 1450} 142] 14-35% 14-20” re 
15°21 15-00° 
15°6° |  15°50'} 15°45° : 
16-12; 16-253 1615% | 16-20 | vee 
16°5! 
16°50| 16-7? 16°90% 16°72? | 16-95 | 16°508| 17-00®| 17-008 i 16'9° 
17-3! | = 17°55!) 17-40! 
QT 
Ca 17-95} 17°99 18-158} 17-959 18°008 { . 
18-7? 19°10} 18°75? | 18-85 19°008 
91 
19°41 19°70} 19°50° | 19-45 | 19-758| 20-008 ll 
Ti | 20-25} 20°18] 20-255) 20-138 ; ane 
20-94} 21-034] 21-008 ; te 
21-6! | 21°70 +=21-65° 
+27 
22-42 | 22509 29-239 1 ie 
Ti 22-90) 23-07 237107; 23-108 
3°64} 23-705 23-508 
24°27 | 24-40% 24-259 
Fe | 25-05] 25°0%) 25-18% 25-031 ee 
The value 0 is given to exceedingly faint lines. 
