Spectrum and the Primary Colour Sensations. 61 



Table IV. 



X. 



Normal 



Eye fatigued 



X. 



Normal 



Eve fatigued 



Persistence. 



with X -660 p. 



Persistence. 



with X -660 fx 



733 pi 



•0353 see. 



•0358 sec. 



•530 Li 



0171 ?ec. 



•0170 sec. 



69:> 



•0248 



•0243 



500 



•0215 



0211 



•663 



•0i98 



0196 



•470 





•0295 



■601 



•0156 



0155 



•460 



•0332 





564 



•0157 



•0156 



■430 



•0513 





•045 



•040 



035 



•030 



025 



020 



•0J5 



Fio-. 5. 



Eye fatigued with 



X651jul 



Normal 



x*^r 



2 



•40/x -45 -50 55 -60 -65 -70 /5 

 Wai/e Length. 



No elevations at all appeared, and the abi rm ^ curve 

 coincided with the normal throughout their ien gtn. Uiis 

 surprising result at first was taken to r 1 



/ 



'- 



