830 PROFESSOR PIAZZI SMYTH ON COLOUR, 
2, Judson’s GREEN. 
A decidedly blue green, generally, or in thin solutions; but in thick solutions looking 
red by transmitted light. 

Solution= 45 strength, Green is largely admitted, and next red. Yellow and violet 
are knocked out. 

Wave-number | Colour Region by 

Intensity. in Brit. inch. Wave-number. 
Light begins. .. 0 34 892 | Crimson Rep | 
Maximum Rep Light 5 38 580 | SCARLET 
Ends in Brown band 3 40 601 | AmBER 
Middle of Brown band — : r A 2 42 265 | AMBER 
End of Brown band , ; 5 : : 3 44. 267 YELLOW 
Maximum GREEN Light. ‘ ‘ 6 _ 47 393 | GREEN 
Endall . é 0 

56 370 | BLUE | 

Solution= 54> strength, Shows one true red band, and one green band only. 


25°31 34 758 | Crimson Rep |, 
25°49 37 286 | SCARLET 
25°64 39 047 | ORANGE 
» Aes | ato atsZ CITRON 
26°67 49 579 | GREEN 
Tro 54 885 | GLaucous 
Light begins 
Maximum Rep Light 
Ends 
Begins again 
Maximum GREEN Light 
End all 
S109) SSNs ce 

Solution= 7}, strength. Shows one red band, and one green band clear and distinct. The | 
bottle full, by transmitted light, makes gaslight look coppery; daylight greenish. 

Light begins 
Maximum Rep Light 
Ends 
Begins again 
25:29 34 495 | Crimson Rep 
25°45 36 765 | RED 
25°55 37 994 | SCARLET 
26°60 48 972 | GREEN 
26:82 50 916 | GLAUCcOoUS 
DAD 53 562 | GLaucous 
Maximum Green Light 
End all 


ey Jay esis (ety) 


Solution=-), strength. Shows one red band only. Fluid ruby-red by transmitted 
gaslight, coppery by daylight. 

Light begins 
Maximum RED Light 
Ends 
“Ghost of a creen band 
_ 25°27 | 34 223 | Crimson Rep | 
25°58.| 35°744) | Rupe 
25°50 37 411 | ScARLET 
26°88 51 467 | Guaucous © 
SON tS) 

