Band and Line Spectra of the same Metallic Elements. 111 
In larger Quantities. 
(1) 2 ers. Cs. in 5 portions. A strong continuous spectrum devoid of bands. 
All the lines recorded above appear strongly. 
(2) 1 gr. Cs. in 3 portions. 
(3) 0°5 gr. in 2 portions. 
(4) 0-1 gr. in 1 portion. 
The continuous spectrum is weakened, 
but the line spectrum is strong. 
No bands similar to those in the rubidium, potassium, sodium, and lithium 
spectrum were photographed, but only a strong continuous spectrum. 
CALCIUM. 
The salt used was Ca(NO;),. Oxyhydrogen flame spectrum. Photographed with 
Wratten and Wainwright’s panchromatic plates. 
Quantity of 
Calevum. 
(1) 0°5 er. A spectrum of strong bands in the red, orange, and green; five 
in 5 portions. of which are less refrangible than the sodium rays. 
T.—Red. Il.— Red. III.—Red. TV.—Red. V.— Orange. 
6880 6778 | fairly 6568 6346 | very 6062 
le. trong trong. 
neoo | feeble een 6394 | °7°"8 6199] strong. 5966)° © 
Two bands in the green, one very broad and intense, the other less refrangible, 
being narrow and not so strong. 
VI.—Green. VII.—Green. 
ae narro aout two component 
rrOWw. ° 
5746 D978 
5565 
bands very strong. 
5514 ean 
‘ Eder and Valenta’s measurements 
ee of the spark-lines, for Intensity. 
comparison. 
4455 oe 4454-919 10 
4435 | a pains Hecible, Waerans 10 
4226°9 very strong. 4226°870 10 reversed. 
3969 Fo AGI 3968°638 80 solar line, H. 
SHOR aa eee lease 100 ee 
1 
