130 PROFESSOR PIAZZI SMYTH ON 
MARSH-GAS. Enp-on TusBE. October 8, 1879. 
= Methyl Hydride = Light Carburetted Hydrogen =CH,. 
* 
Colour. Subject of Observation. Intensity. anna W.N. Place. Impurities | Pansinants eee | dou 
——_—— — ————| || 
Part 1. : af A ae ‘and 
Red. i : . 36 96 only a few 
Faint thick band, . ; ; : 0°5 Hi 37 402 Carbon of the onde: 
Haze band, . ; ; ; ; 0°8 is, 37 616 Carbon nary Carbo- 
Stronger hazy band, n ; 10 Hh, a4 Pe Carbon but see 
violet series 
Scarlet-Red. | Part 2. of its own. 
Beginning of band going past Red | 1-0 3 38 359 | Carbone 
Hydrogen’s place, # : ; 
SS Red Hydrogen, ' C ; 5 | 38 707 Hydrogen 
End of previous faint band, ’ : 0°5 2 39 050 
Light-Red. Band cleft down middle, : : 1°5 Pa Roo Nitrogen 
Broad band, . é 6 F . 2:0 a BS Nitrogen 
Narrow band, : : i : 20 40 151 Hydrogen 
i : 40 262 
Solid band, . : ; : A 2°5 40 532° || Carbon 
Narrow solid band, . . «|. 2°5 i ee | Nitrogen 
Strong line, . : ; j ; 2°5 40 984 | Hydrogen 
Orange. Band of just resolvable lines, : 20 a te Nitrogen 
Seine , 41 390 
Solid-like band, . : : : 2°5 41 542 Hydrogen 
begins hazily, 15 41 638 
Band J culminates in a line, 25 I 41 865 Hy erouene 
ends hazily, 1'5 42 018 | : 
Very solid narrow band, Sal ee } i ve | Hydrogen 
Faint space of resolvable lines, 15 HHH 
Band line, . 2 I 42 537 2 
Faint space of resolvable lines, 1:0 Hn 
Band line, . 2 i 42 815 Hydrogen 
Dark space, with faintest resolvable : | 
lines, : ; Ge 
allan Stronger band line, 2°5 i 43 163 Hydrogen 
Part 3. ee Mow 
Line left off with in Part 2, 2°5 1 43 157 || 
Fainter line, 15 I 43 282 || 
Dark space with faintest close lines 03 
intervenes, ; F . 
Thick hazy line, 2:0 HH 43 504 Hydrogen 
Strongest line about, 3°0 ] 43 676 Hydrogen 
SS Band of just resolvable lines, 15 HH a ie Carbon ? 
Probable double line, 1'8 | 44 094 | Hydrogen 
Strong thick green line, 5 2°5 B 44 296 | Hydrogen 
Band of just resolvable lines begins, 1:0 44 456 | 
ee 1a a a neat 2-0 44 688 || Hydrogen 
ends, . 1:0 44 943 
, 45 012 Carbo- Carbo- 
psn Narrow band of phate lines, 10 } 45 148 | § Hydrogen Hydrogen 
Citron band begins sharp 4 aes | 45 250 | 
ends in haze, 1 { ; 45 588 Carbon 
Then haze follows, 3 : 0°5 Ht 
; : Carbo- Carbo- 
Hazy eu : 5 j : ; 15 | 45 842 Hydrogen Hydrogen 
Haze intervenes, “ ; HY 
: . | Carbo- Carbo- 
Hazy line, . : A : : 15 | 46195 | Hydrogen Hydrogen 
Haze intervenes, 
SE ee — —_—_— 
