Colour. 
Crimson- 
Red. 
Red. 
Orange, 
Yellow. 
———— 
Light-Red. 
GASEOUS SPECTRA IN VACUUM TUBES. 
CHLORINE, January 16, 1880. 
Subject of Observation. 
Part 1. 
A certain, but thin and haa 
line, , : 
Band, 
Strong red line, probably 
Red Hydrogen, . : i 
Scarlet- Red. Part 2. 
Strong Red Hydrogen, 
Faint group of lines or haze, . 
Hazy band of lines, ; 
Thin line, 
Faint lines in a still fainter 
illuminated region, 
Very thin line, terminating 
faint haze, . ; 
Faint line or group of lines, 
Distinct line, black spite on 
either side, . 
Do. do. 
Do. do. 
Faint broad flat haze band, 
Band of almost resolved lines, 
Do. do. 
Part 3. 
Thin line in faintest haze, 
Line in hazy region, 
Lines bounding a faint band, . 
Very faint hazy line, 
Line, 5 
Very faint line, 
Faint band, 
Exceedingly brilliant line in 
black space, 
Another do do. 
Another do. do, 
Another do. do. 
Faint line, 
Faint line, 
Faint line, 
Brilliant solitary line, shown 
by higher dispersion to be 
double ; its true place seems 
on re-examination to be 
rather smaller, say 48 685, 
and by no means increased 
like the tabular 6” spectral 
niece which I suspect there- 
ore to be in error, 
Intensity. 
1 
15 
5 
— 
Cl. 
Appear- 
ance, 
W.N. Place. 
HIN 
43 279 
43 475 
46 005 
46 548 
46 686 
46 869 
47 146 
47 614 
47 902 
48 109 
48 716 
Impurities. 
) Hydrogen 
38 687 
Hydrogen 
Nitrogen ? 
Hydrogen ? 
Hydrogen ? 
Oxygen ? 
2 
2 
Hydrogen ? 
Nitrogen ? 
Nitrogen ? 
Nitrogen ? 
Inten- 
Chlorine Spectrum 
from 6-inch spark 
by other observers. 
sity. W.N. Place. 
2 37 472 
2 87 955 
2 38 110 
2 38 223 
8 41 584 
1 42 675 
1 42 804 
2 43 882 
2 44 436 
2 44 679 
2 44 765 
2 45 035 
2 45 347 
2 45 543 
2 45 848 
2 45 905 
10 46 520 
10 46 657 
10 46 847 
10 47 167 
2 47 512 
2 47 699 
4 48 160 
117 
Left unclaimed 
and probable 
for Chlorine 
in a l-inch 
spark only. 
34 870 
41 375? 
41 557? 
41 714? 
43 862? 
45 078 
45 325? 
45 560? 
46 548 
46 686 
46 869 
47 146 
47 6144 
47 902? 
48 109? 
48 716 
