832 PROFESSOR PIAZZI SMYTH ON COLOUR, 
1. COPPER AMMONIA-CHLORIDE—continued. 














Solution ;3,5. More decided dulling of red and orange, then of yellow and citron, but 
without perceptible band; and reduction of spectrum to nearly ‘three colours only, 
red, green, a little blue, and then violet. 
Wave-number}| Colour Region by 
Intensity. ad in Brit. Inch. | Wave-number. 
Red light begins 0 25°41 36 166 | RED 
Red endsin green. 2 26°08 43 879 | YELLOW 
Maximum LIGHT in GREEN 4 26:59 48 900 | GREEN 
Green ends in violet . 3 27°02 52 715 | Guaucous 
| End all 0 28°30 61 728 | LAVENDER 
Solution = 35. Red, orange, and ‘yellow all gone; a portion of green, the blue and 
violet left. 
Light begins : 0 26°43 47 461 | GREEN 
| ‘Green ends ‘in violet . 3B ld 53 476 | GLaucous 
Maximum Licut 4 27:30 54 825 | GLAucous 
Endall . 0 
28°30 61 728 | LAVENDER 


Solution = 7;. One violet-blue band only, with its anterior edge greenish. 


Begins green-black . . firs (ae 0 27-11 53 476 | GLAUCOUS 
Maximum Licut 4 E E ; a 3 27:50 56 370 | BLUE 
i End ally ‘ ‘ “ ms ¥s : 0 27°97 59 524 | VIOLET 


Solution = 35. One violet band with first edge inclining to green-black. 


Begins sreen‘blatk” 4. «+ SS: = « 0 27°33 55 036 | BLUE 
Maximum Licar : : : : : Z 27°74 58 106 | VIOLET 
Endall_ . a : s : : 2 0 28°22 61 173 | LAVENDER 



Solution = #4. 

Begins : ‘ : : : : E 0} | e2rer0 57 837 | InpIGo 
MAxIMUM . i , : : : : 1 °| 27-90 59 067 | VIOLET 
| Ends. : k ‘ : ay ed : 0 28°10 60 372 | LAVENDER 





