128 J. C. DeVOSS and rose ganson 



TABLE V (C) 



Confusion of Blue Cambric with Gray Cambric 



Correct No. of Per Cent 



Errors Choices Trials of Error 



Cat 3 285 315 600 47.5 



Cat 5 274 326 600 45.6 



TABLE VI 

 Confusion of Bradley Red with Bradley Black 



TABLE VII 

 Confusion of Bradley Green with Dark Cool Gray* 



TABLE VIII 

 Confusion of Bradley Violet and Gray Cambric. F.E. — 48 



TABLE IX 

 Summary of Confusions of Colors with Grays 



The following curves show graphically the flicker-equivalents 

 of the colors and the numbers of the grays with which they were 

 confused. If Ives's results could be generalized to cover our 

 nicker tests, these curves would represent the relative brightnesses 

 of the colors for the cat and for the human eye. 



*This gray was somewhat faded. F.E. — 9-10. 



