126 : PROFESSOR PIAZZI SMYTH ON 
HYDROGEN. Enpb-on TusE—continued. 
6” condensed Left for low 
Colour. Subject of Observation. Intensity. spark Tables. |temp. Hydrogen. 
Appear- at 
AGGGy W.N. Place. Impurities. 
Part 3—continued. 
A band, : ; ; : 5 2 HH a a Carbon 
Citron. Haze just resolvable continues up ; 
to this line, 15 1 45 893 45 893 
Resolvable haze of thin ‘lines: inter- 
venes. 
A distinctly double line, \| 46 748 Ores 
Fae ere 2 46 880 
Rather strong line, P 1'5 1 47 148 
A haze of thin close lines intervenes, 07 tees ; 
Stronger line, . r 2 l 47 668 Oxygen 
Line haze inter Venes; 8 fe eas eee ce 
Evident line in the haze, 11455 I 47 920 47 920 
Haze of lines intervenes, ; i ee lee 
Green. Hard haze band, . ; H : 15 che } ie a 
Haze of lines intervenes, cheered ean Bl, ores 
Sharp beginning of a eeng green ‘1 th. 48 860 Carbon 
band, i : SERRE 
Line just visible in that ‘cand s tail, 2 1 49 180 ayes 
Another fainter, . 1 I 49 380 49 380 
Decreasing haze of lines ‘intervenes. ; 
Bepuang of a band of hazy lines, 2 Hs 49 970 49 970 
Stronger lines than others, . ; 2°5 | 50 649 50 649 
Band of faint lines, - ; , 1°5 Hl a on 8 
A close hazy double line; subse- y ; : 
quently found cleaner and clearer, 2 iE } a oe a Fe 
and simply a double line, . 
Glaucous. 
Glaucous Hydrogen, painfully bright, | 12 3 52 254 
Parte. 52 252 52 255 52 252 
Glaucous Hydrogen, 10 | 52 250 ; 
Alege of band, , graduated | Cg | eee 52. 538 Caxton 
Faint line in haze, : : 0°5 ne 53 764 
Another rather stronger line, ; 10 AF 54 242 
—_——_ err p ae arene avewagen 
Glaucous Hydrogen and Violet a 
Hydrogen; its place elsewhere 2) ! re) ee 
made=54 773, 
Sharp beginning of graduated ‘band, 15 Hs, 55 358 55 358 
Blue. Faint band 0-9 pb 2n6 Carb 
al 5 ’ . . . i : 56 304 arpon 
Fainter band, : , * 04 Ht ae ue 
Indigo. 57 806 
———_ Still fainter band, : ; : 0°3 “5 58 219 Carbon 
| Violet Hydrogen, . ; ; : 4 1 58 521 
Violet. 
Part 5, 58 523 58 525 58 523 
Violet Hydrogen, . 3 j 58 525 
————— Sharp beginning of faint violet band, 1 58 930 Carbon 
Line, beginning of faint band, ; 1 60 260 Carbon 
Probable thin line, 5 ; ‘ 0°3 60 860 
Lavender. 
Lavender Hydrogen, . 1'5 I 61 932 61 9382 61 932 
Possible faint haze extends thus far, Ol | we 63 090 
