Spectrum and the Primary Colour Sensations. f>7 



fatiguing colour, and tlie results given in Table VII. obtained 

 "from which the curve in fig. 12 is plotted. 



This curve, like that for the first transition point, has no 

 -elevations, but coincides at all points with the normal. 



Fi- 12. 



•06 



-05 



•04 



•03 



■02 



01 



•40/x 



Fatigue colour -570/1 



Normal — 



Fatigue 



•50 -60 



Wai/e Length. 



It was now certain that two more transition points existed, 

 • one between the single green elevation type of curve, such 

 as that for the wave-length X "520 /jl, fig. 13, and the double 

 green and violet elevation type, like that for the wave-lengtl 

 -X'440/x, fig. 16; and the other mar 



F2 



mo- the transition from 



