SENSATIONS IN TERMS OF LUMINOSITY. 



285 



The green sensation is more stimulated by this light than it is in the electric light, 

 whilst curiously enough the blue sensation appears to be very much the same (fig. 10). 



To reduce the curves to equal areas the green sensation has to be multiplied by 

 1-94 and the blue by 149. These are given in Columns VI, VII., and VIII. of the 

 table and are graphically shown in fig. 11. 







Fig. 10. 



10 II I* M |l IOIII<MtOMM041>444*MltIMUMMM 



Sensation luminosities in sunlight of noon in September. 

 Fig. 11. 



Sensation curves (prismatic spectrum) in which equal heights of ordinates form white (sun light). 



