Band and Line Spectra of the same Metallic Elements. 99 
amount of substance to be vapourized in the blast flame. ‘he temperature is 
naturally higher and the area of maximum temperature larger. In the plain 
Mecke burner the first or deep red band is feeble and diffuse; it is apparently 
continuous with the second red band, which, in turn, is seen to have three 
component bands. There are similarly three component bands in the green band. 
Spectrum obtamed from the Spark without Condenser. 
These were observations made many years ago with solutions of known 
strength, contained in Delachanel and Mermet’s fulgurator. When solutions are 
used, the same quantity of material is exposed between the electrodes again and 
again, so that in viewing the spectrum with the eye the average brilliancy is 
observed, and not the aggregate effect as on a photograph. Standard solutions 
of pure calcium salts were made, containing 1:0, 0:1, 0:01, and 0-001 per cent. 
of the metal. The spectra were not photographed. 
Where the number in the preceding column of the following tabulated state- 
ment is repeated, this is indicated by an asterisk in place of the figures. 
Description of Spectrum. 
PROPORTIONS OF CALCIUM IN SOLUTION. 
1:0 per cent. 0-1 per cent. 0-01 per cent. 0:001 per cent. 
A band, ( 6460 ( * appears as a ( o 6460 appears as a 
> short line, + short line. 
| e486 | = | 
A narrow band, 6348 f[ * f @ 
GBH || & | * 
[ 6265 * * 6265 
A broad band, 62038 oe * 
| 6161 # # 
{6068 * * 
| 6044 | | “ e088 
An orange band. The orange band has vanished. 
5933 TOSS CUES BS & || some o fhant Mine, 
short line. 
5534 us * 5584 
5517 ce * 5517 
Greenish diffuse band. 
i 2 . a a wd d 
A line. 4226-9 4226-9 { 4226:9 appears as a 
short line. \ 4226°9 a short line. 
