IN PRACTICAL ASTRONOMY, SPECTROSCOPICALLY EXAMINED. 819 
2. JUDSON’S PEACH-BLOSSOM DYE; a blue Pink. 

COAL-GAS LUMINOUS FLAME, as foundation. 




Wave-number 
Colour Region 














Stronger solution, strength = 5. 
Light begins : 
Maximum light, Rep . 
END ALL 




Only one band, the red one, visible. 
Le ne in Brit. Inch, | by Wave-number. 
False red glare . ; 0 .| 24°86 29 087 | Ultra Red 
First true red light . : i) 25°18 33 102 | Crimson RED 
Slit, by sodium light, 1st side 11 26°01 43 015 | YELLOW 
x . 2d side AL 26°03 43 203 | YELLOW 
Maximum Licut, YELLOow . 12 26:03 43 403 | YELLOW 
End of all light at violet 0 28°46 | 62 712 | Lavender 
Solution pale, or gas: 
Red light begins , 0 25°32 34 892 | Crimson RED 
Maximum LIGHT, ORANGE . 9 25°77 40 601 | AMBER 
Ends in pale shade 4 25°98 42 882 | AMBER 
| Said pale shade ends . 4 2617 | 44 743 . | YeLLow 
Maximum BiveE LicHt 5 26:92 51 813 | GLAuUcouUS 
End all 0 28°10 60 372 | LAVENDER 
Stronger solution, strength = sty 
Light begins : 0 25°32 34 892 | Crimson RED 
Maxmmum Licut, RED ¥ 6 25°61 38 700 | SCARLET 
Red light ends hazily in black . 1 25°86 41 615 | AMBER 
Black ends in green shade . 2 26°77 50 454 | GLaucous 
Maximum Licut, VIOLET 4 27°60 57 110 | Indico 
End of all light 0 28°26 61 451 | LAVENDER 
Stronger solution, strength = =}> 
Light begins : 0 25°28 34 364 | Crimson RED 
Maximum Licut, Rep, 4 25°58 38 344 | SCARLET 
Ends . ; 0 25°63 38 941 |ScaRLET 
Light begins again 0 27°62 57 274 | Inpico 
Maximum Licut, VIOLET 2 27:92 59 207 | VIOLET 
End all 0 28°28 61 595 | LAVENDER 

0 25°27 
2 25°50 
0 25°60 
34 223 
37 411 
38 580 
Crimson RED 
SCARLET 
SCARLET 
