FLAME SPECTRA AT HIGH TEMPERATURES. 
179 
Calcium Fluoride. 
The substance used was fluor spar. Exposure 40 minutes. 
, Ivory scale- 
numbers. 
1 
X 
X 
Remarks. 
12o 
16094 
6213-5 
The centre of a band 
17-2 
16642 
6009 
24 to 
L 28-2 
17425 
17910 
5739 1 
5583-5 J 
A faint band 
r 28-2 to 
30-5 
17910 
18171 
5583-5 1 
5503 J 
Band stronger than the preceding 
; j 
35-15 to 
18683 
. 5352-5 1 
1 
Band 
' 1 
[36-3 
18812 
5316 J 
r 
1 j 
r36-3 
18812 
5316 1 
Band 
36-7 
18855 
5303-5 
: 84-35 
23637 
4231 
A strong line. 
The last is possibly a line measnred in the calcium spectrum by Katsek and Runge \ 4226’91. 
‘ Ueber die Spectren der Elemente,’ Konigl. Preuss. Akademie, 1891, IV. 
Strontium Oxide. 
Strontium sulphate was the substance used. Exposure 30 minutes. 
Ivory scale 
numbers. 
1 
X 
1 
X 
X. 
Remarks. 
f 15-4 to 
16434 
6085 1 
116-3 
16520 
6053/ 
A band. 
21-9 
Weak line. 
29-2 
18028 
1803918* 
*5543-49 
Weak nebulous line. 
63-8 
21697 
2170365* 
*4607-52 
Strong line. 
64-8 
21780 
4591 
Faint. Sr? 
84-25 
23650 
2365794* 
*4226-91 
Faint. 
85-0 
23700 
4216-5 
Faint. 
93-9 
24517 
2452254* 
*4077-88 
* Lines measured by Kaysee and Runge. ‘ Ueber die Spectren der Elemente,’ Konigl. Preuss. 
Akademie, 1891, IV. 
2 A 2 
