Quantity of 
Strontium. 
(1) 0°5 gr. in 
5 portions. 
I.—Red. 
7102 
6982 
V.—Red. 
631 al 
6238 
6178| 
IX.—Green. 
5702 
5640 
feeble. 
strong. 
\ feeble. 
Band and Line Spectra of the same Metallic Elements. 113 
STRONTIUM. 
The salt used Sr (NO,), °4H,0. 
Description of Spectrum. 
A continuous spectrum, consisting of a series of bands in the red, 
green, violet, and ultra-violet, with some lines. 
IIl.—Red. ITT.—Red. IV.—Red. 
6878) _ 6766) . 6530| intense, composed 
6782 | cenle. 6548] strong. 6382| of two narrow 
bands. 
VI.—Orange. VII.— Yellow and Green. VIII.—Green. 
6120] . 5838) 5791| 
6003} intense. 5819) feeble. 5744 feeble. 
; X.—Green. XI.—Green. 
5576). _, 5436) ; 
| 55009 very faint. 5412] very faint. 
The faint green bands are seen between A\ 5890 and 5086. 
There are strong bands in the more refrangible rays between \ 4600 and ) 38600. 
The lines are ) 4608. Very strong. 
Quantity of 
Strontium. 
(2) O-1Lin 
1 portion. 
(3) 0:01 gr. 
violet are absent. 
4216. Very feeble. 
4078. Very feeble. 
The spectrum is considerably weaker. The bands in the green, 
violet, and ultra-violet extending to 3600 are very faint. 
The lines \ 4216 and \ 4078 are extinct, but that at 4608 is 
strong. 
[6878 
|6782 
The line \ 4608 is strong. 
The band at is extinct. ‘The bands in the green and 
