GASEOUS SPECTRA IN VACUUM TUBES. 115 
CARBONIC OXIDE. Enp-on TuBE. October 13, 1879. 
CU: 
Colour. Subject of Observation. Intensity. aor W.N. Place. || Impurities. Constituents Unaleanes 
Part 1. 
Red. 0°5 fs ae - : Carbon 
Faint hazy bands, . ; : : 07 Ht Ha He Carbon 
c 37 579 
{08 | ex aL oe Carbon 
Part 2. 
Scarlet-Red. Red line, ‘ j ; . 1:0 1 38 433 Carbon ? 
Red Hydro. en, 60 | 38 715 Hydrogen 
q Broad band of barely resolvable : an 39 103 Oxygen ?+ 
Light-Red. te, Ee 39 935 
Hazy line, . : 4 é : 07 : 40 141 Hydrogen 
Narrow but solid band, . 5 : 20 i mA ee Carbon 
i i i 40 533 ; 
ae with faint, alee bright 0-7 thin a Nitrogen ? 
Very black but narrow space ‘inter- 
venes. 
Pale haze band of resolved lines, . 1:0 min } ia oe 
Strong line, . : ; é : 2 I 41 246 Oxygen 
- 41 321 
Orange. Pale band of resolved lines, . : 1:0 {HINT 41 588 
Solitary haze line, . F F : 1:0 : |, 41 655 
erro ones band— ia ee 
Sharp beginning, 3 oS ; 
Faint ending, 1 a 42 058 Carbon 
Band begins solid, 2°5 : 42 128 : 
and ends faint in resolvable lines, 1 se 42 432 Nitrogen} 
165 42 454 ; 
Do. do. 0-5 42. 665 Nitrogen ? 
1:2 42 760 f 
Do. do. 03 43 034 Nitrogen ? 
Yellow line (not the Salt-line), 2°0 I 43 142 
; Hydrogen 
Part 3. 43 141 
The yellow line left off with in | 15 I 43 140 : 
Yellow. Part 2 
Faint hazy space with "resolvable 05 43 233 
lines, ttl 43 465 
Sharp line, 1:0 I 43 534 
Strong line, . ; ; é 2°0 1 43 706 Hydrogen 
Broad hazy space of resolved lines, 1:0 IH a os Q 
Very narrow band, 10 = a Bs Hydrogen 
Broad space of just resolvable haze, 2:0 | HEE re a | g 
Citron. Dark space with faintest close lines, OS as } is i 
Grand Citron band— | 
Sharp beginning, 4:0 te. 45 281 ||) 
Faint end, . 10 itis 45 855 || ( Carbon 
Second still fainter end, Of vee 46 392 
15 47 124 Carbon 
at 0-7 47 435 
Group of faint lines and haze, 10 l ! 47 677 Oxygen ? 
econ 1:0 | 47 884 Hydrogen | 
48 202 : 
Haze band, 5 LS jet } 48 385 
ee Per 1:0 | 48 503 
Faint lines in haze, } 10 l 48 721 
