INCREASING TEMPERATURE, 
See omiNn oFec PROSCOPY ACCORDING To 
AS SHOWN sy THE NUMBER, INTENSITY, AND SPECTRUM-PLACE oF ALL KNOWN LINES, RESPECTIVELY. 
. Soc. Edin? 
Vol. XX1X, Plate II. 
Letter Names 
STANDARD 
SUN-LINES 
VIOLET-END 
f Light at place, by Vertical white space, approximately.) 
60/000 
WH 
SUY O 
55/000 
( Inten 
Glaucous.. 
MUDDLE SRECTION is S| 
SSS 
SPECTRUM-SCALE, By Number of Light-Waves to an Inch, British. 
-END 
§<t|oOr Efe 
STANDAR 
SUN-LINE 
A FEW ONLY 
of the 
TREEUIRTIC: OR 
ATMOSPHERIC LINES 
at Freezin 
Temperature . 
g 
(SLIT extra wide) 
2 
MERE 
ABSORPTION 
Colour Edges at 
Temp® 68° F. 
© 
(23 
FLAME LINES 
at Lamp-flame 
Temperature. 
4 
LINES 
ill? by Linch Electric 
GAS-VACUUM-TUBE 
Induction Sparks 
5 
CHEMICAL LINES 
in 2 inch Electric 
Induction Sparks. 
6 
CHEMICAL LINES 
in 6 to 10 inch Electric 
Sparks, condensed. 
S 
NORMAL SOLAR 
) 
ANGSTROM 
SPECTRUM. 
8 
1877-8. 
SPECTRUM 
25000 
LISBON SOLAR 
70000 
W.&A.K Johnston. Edinburgh, and London. 
