Spectrum and the Primary Colour Sensations. 73 



Table XL, and are plotted on an enlarged scale in fig. 20. 

 The four transition points are indicated by short vertical 



Fis-. 17. 



03 



02 



01 





j> 













Fat 



i'$ue co lour 



'400/jl 





) 



i 



Norma/ — 







I 



Fatigue 







\ 

























\ 













\1 













l\ 













\\ 







• 









\° 







X 



/p 







\ 







// 

 // 







V 







x/ 







\ 





// 



V 







\ 



N. 



X 



/ 





'4-Oju 



•50 -60 



Wawe Length. 



•70 



lines as before, and are arranged in pairs quite symme- 

 trically situated in relation to the two minima of the curve. 



