OXYGEN. Enp-on Tuse, Spark=0''8. 
Symbol=O. 
Colour. Subject of Observation. Intensity. EVER W.N. Place. 
Crimson- Part I. 
Red. Faint but thin sharp line, 0°5 | 32 600 
Faint beginning of haze, 1-0 33 150 
Red Sharp ending of same haze, | 34 240 
—- - Sharp line (Ox. *), 5 | | 36 270 
Haze, . : 07 } 3s oF 
Scarlet- 
— Part 2. i 
Red Hydrogen, brilliant but blurred, | 10 | i 38 705 
—-. Strong line (Ox.), . 5 3 I | 39 360 
a 39 600 
Light- Broad haze band, 1 39 964 
Red. 
——_—_— Narrow haze band, 1 # 40 126 
see 40 308 
Resolvable haze band, 2 Hi 40 610 
Resolvable haze band, 2 HE ie one 
Hazy line, . 1°5 | 40 954 
Orange. Infinitely ‘thin line, 0:2 41 110 
Grand (Ox 2) line, . 4 | 41 266 
Infinitely thin line, 0'2 | 41 662 
Hard edged band, . 15 | ps a oe 
— Line with haze background, . 15 iH 42 026 
Double line in haze, _ . ; 4 1'5 ili a a 
t « 42 310 
Faint but resolvable band, 10 Fe 49, BBQ 
A single line, d 7 | 42 640 
Line, perhaps double, 1:0 l 42 809 
Band of lines, 4 : 07 ill) 42 964 
Thick line (a yellow line hes erat 
Yellow. Sod. a), . ant tae I ae 
Part 3. 
The last yellow line (not Sod. a) 15 I 43 132 
0-7 i 43 250 
Several thin sharp, but faint lines, 0°7 | 43 394 
| oF |; 43 530 
Strongest line yet, j 5 2 I 43 683 
| 1 rE 43 806 
— ——_ Lines in haze, 1 ae 43 990 
1 on 44 128 
Broad line, Leb I 44 312 
| Line in haze, 1 Ww 44 532 
Faint line in haze, ; 0:7 ‘i 44 647 
: : P : : 4 44 794 
| Citron. Band just resolvable into lines, 0°5 a 45 166 
Sharp beginning of a brilliant band, igh: Eine 45 248 
1 jee 45 754 
| Thin lines in the long tail of above 05 | 45 900 
Randi go. ome | 46 108 
1 | 46 520 
———. Brilliant clean line (Ox 2), 3 | 46 724 
Green. Faint, but edged band, . 0'5 Ba - rie 
GASEOUS SPECTRA IN VACUUM TUBES. 
| 
| 
| 
| 
| 
139 
August 11, 1879. 
Impurities. 
Hydrogen 
foo 
Hydrogen 
Carbon ? & 
Hydrogen ? 
Hydrogen ? 
Hydrogen 
Hydrogen 
| Carbon ? 
Hydrogen ? 
2 
| Hydrogen 
2 
Hydrogen 
Hydrogen? 
Hydrogen 
Hydrogen 
Hydrogen 
Hydrogen 
Hydrogen 
Hydrogen 
nee 
Carbon 
Hydrogen ? 
Constituents 
dissociated. 
Left unclaimed 
for Oxygen. 
32 600 
36 270 
41 266 
42 640 
46 109 
46 724 
