98 Harrtev—An Investigation of the Connexion between 
IV. The Spectrum of Calecum as obtained from Lime. 
To compare with the preceding spectra, a bead of fused calcium nitrate was 
placed in the flame of a Mecke burner of the smallest size. When all evolution of 
gas had ceased, the bead of lime was placed in the middle of the flame, and about 
3 mms. above the grating of the burner, which is the point where the highest 
temperature can be communicated to an object of the size of the bead on the 
platinum loop. 
The lime was white hot, and it appeared as if translucent. The flame was 
coloured a pure pale red. Measurements were made with the eye of the edges of 
bands and strong rays. ‘The bands seen were two in the red, one in the orange, 
and one in the green. The spectrum was identical with those numbered I. and 
Ill. ‘The plates used were Wratten and Wainwright’s panchromatic. 
Calcium— Flame Spectra: Mecke Burner. 
Description of Spectra. 
Mecke Burner with Air Blast. | Mecke Burner without Air Blast. 
IN IN 
Ist. Deep red band, 1. r. edge, 6482 6469 | ‘ 
‘very feeble diffuse band 
iy 5B, GIRS, 6395 6376] very feeble diffuse band 
6280 
6200 Ist component. 
feeble) 
2nd. Strong red band, 1. r. edge, (ooze to | 2nd component. 
lrg 6158} 
m. r. edge, 6098 very 
feeble 
i © \ 3rd component. 
6150 
3rd. Orange band, 1. r. edge, 6037 6050 
m. r. edge, 5935 5964 
4th. Green band, 1. r. edge, 5555 Je 
A component of 5209) strong components. 
: ! 55384 55 34)\soeno 
the band, 
5515) less strong. 
m. r. edge, 5514 
In these two spectra, in which the bands of the one are wider than those of 
the other, the sole difference in the mode of producing them caused a larger 
