Spectrum and the Primary Colour Sensations. 



65 



in Table V. and Table VI., and are plotted in fig. 9 and 

 fig. 10 respectively. Both curves, it will be noticed, are 

 characterized by a single elevation in the green. 



Fig-. 10. 



06 



\ 









y 





Fatigue colour S40/J. 











Norma/ — 





05 



ra l /yu e 















04 





\\ 











\\ 













\? 









03 





\ 







X 



i 





\\ 







i 







\\ 













\ 







/ 







\\ 





J 



/ 







\ 





f 





02 









f 











/ 



y/ 





•01 















-40/i 



•50 -60 

 Wave Length. 



•70 







Table V. 







X. 



Normal 

 Persistence. 



Eye fatigued i 

 with X -560 /«. 



A. 



Normal 

 Persistence. 



Eye fatigued 

 with X -560 p 



•735 p 



•690 



•647 



•593 



•553 



•535 



•0337 sec. 



•0221 



•0167 



•0137 



•0141 



'0323 sec. 



•0224 



•0164 



•0144 



•0164 



•0169 



•522 p 



•495 



•453 



•423 

 •410 



•0164 sec. 



•0209 



•0360 



•0538 



•0620 



•0189 sec. 



•0214 



•03S0 



•0500 



Phil. Mag. S. 6. Vol. 38. No. 22o. July 1919. 



F 



