FLAME SPECTRA AT HIGH TEMPERATURES. 
207 
following :— \ 4047 broad line, Fe ; 4033, Fe ; 4023, Fe ; 4004*5 Fe ; 3996, Fe ; 
3975, CaO ; 3963 ? ; 3947*5 ?; 3989 ?; 4013 ? The pure metal cannot be vapor¬ 
ized except by the arc and spark.^ Evidence of this is afforded by the fact that an 
uncondensed spark yields a very beautiful band spectrum. The lines of silicon have 
been looked for but not detected in this spectrum. 
lyoiy scale 
numbers. 
Description of spectrum. 
1 
,\ ■ 
X. 
6 
20 
120 
170 
96'5 
101*7 
102-8 
Continuous band of rays from 6 to 170 strong, 
j Very intense from 20 to 120 
Lines at .. 
? ? . 
55 . 
24740 
25.300 
25294 
4042 
3968-3 
3953-5 
COPPEE. 
Copper foil was heated in the flame. Two silver lines were observed in this 
spectrum, X 3383*5 and 3282*1. 
Micrometer 
measurements 
in hundredths 
of an inch. 
Description of spectrum. 
1 
X ' 
X. 
Remarks. 
30-3 
The centre of a broad line . 
18160 
5.506-5 
This spectrum is partly due 
to CuO apparently. 
44-35 
A faint narro-w line .... 
19684 
5080 
167-31 
The centre of a broad line . 
30398 
3290 
3289-9, sjmrk. Hartley and 
Adeney. 
170-76 
5 5 5 5 55 • • 
30652 
3262-5 
3265'2, 3260-2, two spark 
lines, Hartley and Adeney. 
The lines 3290 and 3262-5 
are frequently seen in 
pliotographs where they 
would be least likely to 
be found. 
* This statement is not quite correct. See Appendix (5). 
