. Physical researches on sensation [by] Frank Allen [and others]. 410 .0451 .0491 .554 .0130 The second pair of complementaries was red {). = .6^6 u) andgreen (/ = .493/i), determined by Helmholtz. The readings of the 52 FRANK ALLEN. [Vol. XXVIII. persistence of vision in this case are given in Table V. and plotted inFig. 7. The normal curve in this figure is the same as that for thepreceding case, given in Table IV. Table V. A Eye Fatigued with A = .656 iL A = .492 \ A Eye Fatigued with A = .656IX. A = .492 (n. A Eye Fatigued with A = .656 tx A = .492^1. .725/i .0353 sec. .566 « .0122 sec.

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. Physical researches on sensation [by] Frank Allen [and others]. 410 .0451 .0491 .554 .0130 The second pair of complementaries was red {). = .6^6 u) andgreen (/ = .493/i), determined by Helmholtz. The readings of the 52 FRANK ALLEN. [Vol. XXVIII. persistence of vision in this case are given in Table V. and plotted inFig. 7. The normal curve in this figure is the same as that for thepreceding case, given in Table IV. Table V. A Eye Fatigued with A = .656 iL A = .492 \ A Eye Fatigued with A = .656IX. A = .492 (n. A Eye Fatigued with A = .656 tx A = .492^1. .725/i .0353 sec. .566 « .0122 sec. .470^ .0204 sec. .710 .0335 .548 .0125 .463 .0238 .698 .0230 .530 .0130 .454 .0293 .670 .0161 .517 .0137 .445 .0395 .643 .0136 .505 .0151 .428 .0522 .615 .0122 .492 .0167 .410 .0527 .590 .0120 .483 .0182 On comparing the figures both curves will be seen to be essen-tially the same, and to differ greatly from the curve shown in The fatigue curves obtained with the complementary colors are S5T EYE V^Ar/§(J£D W/rHCOMf?i.£MEA/rAf-/ COLO/fS ffEoA=.eke3ya.

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphysiol, bookyear1902