112 Harrituy—An Investigation of the Connexion between 
Hagenbach and Konen do not give these pairs of lines in the flame spectrum 
of calcium, but they occur in the are and spark; the last two correspond to the 
solar lines H & K. 
A continuous but feeble spectrum extends from the green to about d 3640. 
It is remarkable that the only lines observed on the photographs previously 
taken from flame spectra were 4226°87 and 4454°9. 
Quantity of 
Calevwm. 
(2) Oril eae. The bands are strong, the two least refrangible have become 
ore faint. The orange band an ee 
5964) 5515 
are each seen to be composed of two bands. 
The line \ 4226 appears strong, but the two pairs of lines have 
entirely disappeared. 
and the strong green band 
3) 0:01 gr. 
( Bs 1 ae The two least refrangible bands in the red (reoet™4 | eoiak 
have quite disappeared, and the narrow green band lee is very 
faint. The other bands and the line 4226 are strong. 
(4) 0-001 er. 
on | paper. 
9 
Two bands, one in the red ey and one in the green 5285 ; 
6140 5515 
are still strong; the others have vanished. The line \ 4226 is fairly 
strong. 
(5) 0:0001 gr. No spectrum. 
(6) 0:00001gr. No spectrum. 
The bands in the oxyhydrogen flame spectra of calcium are degraded towards 
the violet, and where a band is seen to be composed of two narrower component 
bands, the stronger of the two is the less refrangible. 
