Hartiry anp Ramace—Banded Flame-Spectra of Metals. 
THe FLAME-SPECTRUM OF PALLADIUM.* 
Bands in the nature of flutings composed of fine lines. 
Wave- 
lengths. 
Description. 
Remarks. 
A continuous spectrum extends from the green to wave- 
length 4648. 
A nebulous line. 
oy) ? 
” 
A line. 
A very weak line. 
A line. 
oe) 
AN Greate Tne, 
A line. 
9? 
A weak line. 
A line. 
A weak line. 
A line. 
9? 
Termination of a band. 
A very weak line. 
) 9? 9 
A broad weak line. 
A very weak line. 
? 9? pe) 
re) ”? ? 
4604: 
4593: 
Co 
sles 
4531'1 E. 
4519°1 E, 
4489°3 H 
4473°4 K. 
4443°1 EK. 
4433°1 E. 
4406°8 E. 
& H. 
& & 
sala 
& H. 
& H. 
& H. 
The large number of 
lines in the flame- 
spectrum of palla- 
dium lying beyond 
wave-length 43800 
and extending to 
3200 is not in- 
cluded in this de- 
scription of the 
spectrum but only 
the banded portion. 
The lines are, how- 
ever, very strong, 
and constitute a 
very important fea- 
ture of the spec- 
trum of this ele- 
ment. 
E. & H. Spark lines. 
Exner & Haschek. 
Lecocq de Boisbaudran, 
and also Thalén, 
gives a line obtained 
from palladious 
chloride solution, 
by the spark with 
a wave-length, 
4473°6, and there- 
fore at the termina- 
tion of this band. 
349 
In the course of this investigation experiments have been made with other 
elements. 
sufficiently complete for publication :— 
Strong Continuous Spectra: Molybdenum, tungsten, osmium.—A continuous 
spectrum, which is not strong, is rendered by mercury. 
The following gave the spectra indicated below, but details are not yet 
* Wollaston was the discoverer of palladium, and the specimen from which this spectrum was taken 
was obtained directly from him, by the late Sir Robert Kane, r.z.s., by whom it was presented to W. N. 
Hartley, on April 25th, 1888. 
