IN PRACTICAL ASTRONOMY, SPECTROSCOPICALLY EXAMINED. 
7. Judson’s CRIMSON—continued. 

823 

Solution= 545 strength. Shows one red band only. 




Light begins 
Maximum Licut 
Light ends 
Wave-number 

Colour Region by 


Light begins 
Maximum LicHt 
Light ends 

Intensity. Us in Brit. inch. Wave-number. 
0 25°35 35 298 | RED 
4 25°67 39 417 | ORANGE 
0 25°92 42 265 | AMBER 
Solution=~, strength. 
0 aon 35.575 | RED 
2 25°55 37 994 | ScARLET 
0 25°68 39 526 | ORANGE 

8. Judson’s RUBY. 



COAL-GAS LUMINOUS FLAME as foundation. 

Wave-number 
in Brit. inch. 
Colour Region by 
Wave-number, 



False red glare 
First true red light 
Slit, by sodium light, Ist side 
a . 2d side 
Maximum Licut, YELLow 
End of all light at violet 
Intensity. iit 
0 24:86 
1 25°18 
A 26°01 
We 26°03 
12 26:03 
0 28°46 

29 087 
33 102 
43 015 
43 203 
43 403 
62 712 

Ultra REpD 
CRIMSON RED 
YELLOW 
YELLOW 
YELLOW 
LAVENDER 

Solution=strength of .j,. 
Shows dark bands in citron and blue-green, but bright 
regions in the red and violet. 

Light begins 
Maximum, Orange Light . 
Beginning of dark band . 
Centre of dark band 
End of dark band : 
Centre of bright-green band 
Green ends, blue begins 
End all : 
25°35 
26-05 
26°22 
26°32 
26°47 
26°67 
27-00 
28°38 
— ORMNWE&O CO OO 

35 298 
43 592 
45 249 
46 275 
47 824 
49 579 
52 549 
62 251 

Rep 
YELLOW 
CITRON 
CITRON 
GREEN 
GREEN 
GLAUCOUS 
LAVENDER 


