Spectrum and the Primary Colour Sensations. 71 



colours on either side were tried. The readings are shown 

 in Table X. and plotted in fig. 18. This curve is without 

 any indication of elevations, and coincides throughout its 

 course with the normal. 



Fi<>\ 15. 



04 





. 











A 

 J 



n 



x\ 



l\ 

 l\ 



U 



i 



Fatigue colour -460jj. 

 A/orma/ 





03 



02 

 01 



Fatt/QLS " """■ 







\V 



\\ 

 \\ 

 \\ 

 \ 







X 



1 

 1 

 1 







V 



/ 



X 



/ 

 / 



>' 



/ 

 / 



'4-0/x 50 -60 



Wave Length. 



•70 



In order to exhibit the seventeen curves described in 

 the preceding pages comprehensively in a simple figure 

 (fig. 19), they have all been replotted so as to make the 

 normal curve a straight line by reducing its scale in nil 



