IN PRACTICAL ASTRONOMY, SPECTROSCOPICALLY EXAMINED. 821 
5. MAGENTA RED—continued. 


Solution of strength = ,3,. One strong red, and one weak violet band. 

i} 
Wave-number| Colour Region by 
| Intensity. q. | in Brit. Inch.| Wave-number. 








Light begins 0 25°35 35 298 | RED 
Maximum Rep . 6 25°80 40 933 | AMBER 
Ends. 0 26:06 43 687 YELLOW 
Begins again 0 27°77 58 309 | VioLEr 
Faint VIoLeET Maximum 1 28:10 60 372 LAVENDER 
End all 0 28°30 61 728 LAVENDER 
Solution of strength = =}, 
Light begins. : : : 2 : 0 25°34 35 162 RED 
Maximum REp . ; . : : ; 4 25°70 39 T7717 ORANGE 
Gnd all . ; , ; F 2 2 0 25°93 | 42 3738 AMBER 
Solution of strength = 34. This red is most like the ruby-red glass, but still clearer. 



Light begins. : : : ; : 0 25°32 34 892 | Crimson Rep 
Maximum Licut, RED : : ; , 3 25:56 38 124 | ScaRLET 
Endall_ . : : : : : , 0 25°75 40 388 | AMBER 

6. Judson’s PUCE or PLUM COLOUR. 
A not very red, but decidedly impure, red-purple, or red-lilac. 






COAL-GAS LUMINOUS FLAME, as foundation. 
é Wave-number | Colour Region by 
Intensity. O: in Brit. Inch. | Wave-number. 
False red glare . : : : ; , 0 24°86 29 087 | Ultra Rep 
First true red ight . : 2 : ' iL 25°18 33 102 | Crimson RED 
Slit, by sodium light, 1st side. ; 5 11 26°01 43 015 | Yellow 
# 3 2d side . ‘ : vf 26:03 43 203 | Yellow 
Maximum Licut, YELLOw . . : ; 12 26:03 43 403 | Yellow 
End of all light at violet . ; ; : 0 28°46 62 712 | LavenderGray 

VOL. XXVIII. PART III. 10 F 


