Hartury and Ramace— Banded Flame-Spectra of Metals. 347 
Tur FLAME-SPECTRUM OF INDIUM. 
The spectrum consists of bands and lines, with the bands degraded towards 
the red. 
Waye- 
lengths. Description. 
3978 The more refrangible edge of a band. 
8958 ? er) ”) ” 
3902 5 5 5 », weak, 
> > 
21 A nebulous line. 
) ” 
3724 The more refrangible edge of a band. 
9? ”? +) Le) 
NY A nebulous line. 
3587 The more refrangible edge of a band. 
re) Le) 2? oh) 
47 A nebulous line or edge of a band. 
18 The more refrangible edge of a band. 
3388 90 99 99 on strong. 
23 ” ” ” ” strong. 
THe FLAME-SPECTRUM OF BERYLLIUM. 
The oxide was heated in the oxyhydrogen flame. It is to be presumed that 
the spectrum is that of the metal and not of the oxide, as in the case of aluminium. 
The bands are degraded towards the red. ‘The least refrangible line in the spark- 
spectrum is 4572-7 (Thalén) and 4571-:9 (Kirchhoff). The arc-spectrum gives a 
line at 3904-7 (Lockyer). 
W. od 5 
natin. Description. 
4780 
oe The more refrangible edges of narrow bands, degraded towards the red rays. 
08 
* A spark-line occurs near this wave-length, 3834:7 (Hartley & Adeney), also 3835'2 (Hxner & 
Haschek). 
TRANS. ROY. DUB. SOC., N.S., VOL. ViJ., PART XI. 3 B 
