116 PROFESSOR PIAZZI SMYTH ON 
CARBONIC OXIDE. EnpD-on TuBE—continued. 
Colour, Subject of Observation, Intensity. AED OB W.N. Place, || Impurities, Constituents eo 
Part 3—continued. 
Green. Grand beginning of green band, . 5 Ea 48 842 Carbon 
Faint show of Green Giant, . : 2 | 49 201 eee 
Tail of Green band extends thus far, 0'5 oe 49 877 Carbon 
; 49 953 Hydrogen? 
Haze band, . nike} “FEY, } 50 140 2 
1:2 50 235 
Hazy lines, 07 50 380 
1:2 # | 5O 492 
Resolvable haze band, . ' z } te Hh os Bee Hydrogen x| Carbon ? 
Faint resolvable § faint beginning 0°5 50 964 
haze band, sharp end, O)s Si \ aon 51 263 
Hazy line, . . ° . 1:0 51 505 2 Carbon ? $ 
Very faint hazy space follows, 0°4 Ht 
Glaucous. Glaucous Hydrogen, . : 5 | 52 256 Hydrogen 
Part a 52 258 
Glaucous Hydrogen, . , : 4 i 52 260 Hydrogen 
Grand blueband ; sharp beginning of, 3 i, 52 523 Carb 
Do. do. weakendof, . 0°5 Hh 53 008 § | ges 
( 1 : Be 775 
2 4 : : - 1 220 
eae sl lines, in still fainter 1 05 54 749 Hydrogen ? 
z : ¥ ; ; : { 0°5 55 177 
Blue. il H 55 514 Hydrogen ? 
Violet band; sharp beginning, 2 is, 56 240 ark 
— Do. faint ending, 1 is 56 652 {| aTpeD 
c : 03 : 57 037 
Indigo. Hazy lines, . F ; 5 4 1-0 57 512 
Second violet band; sharp be- ; 
ginning, . : . ; : Mey aoe ey Carbon 
Do. do. faint ending, . 0'3 58 235 
Violet Hydrogen, . 5 5 2:0 I 58 512 Hydrogen 
Violet. Part 5, Bo OE 
Violet Hydrogen, . : ; 1°5 l 58 an Hydrogen 
Faint band; sharp beginning of, 1:0 58 81 
Do. ‘faintend,. + 03 |) # 2) 59 088 Sane 
1:0 59 376 
ae Do. don as : ; : 03 Hn, 59 760 
Hazy line, . . . 0'5 : 60 211 
: 1:0 ts 60 410 
Faint band, . 03 is 61 028 Carbon 
TAC eaen Rather stronger and greyer band, . aa i. a re Carbon 
Very faint band, 0°5 62 716 Carbon ? 
Suspected line, Ost: Gin 63 689 a 
End of visible Spectrum. 
When viewed with higher dispersive powers as 11°, 22°, and 33° Dispersion A to H, the large bands of this spectrum, — 
however solid, smooth, and compact they may appear to small dispersion, separate in the most marvellous manner into thin 
hard separate and as well-defined lines as any we could wish to see ; but it would take weeks to measure them all. 
Meanwhile, with this spectrum, Hydrogen is the only large and certain impurity ; Carbon is the chief, and Oxygen a minor, - 
constituent. The yellow unnamed lines 43 141 and 43 706 appear; also the doubtful 51 505, to be low temperature 
Hydrogen lines. 
