. Physical researches on sensation [by] Frank Allen [and others]. / 0 l\ 1111 0 .020 1 . 1 OlS \ L / A/ V, ^ 4- WAVE L010 4\0^ 4 0 .6 S .6 0 e S .7 0 ys red and green elevation type, it was evident that the transitionpoint must be near X570/^. This hue was then used as the Table VII. X. Normal Eye fatigued X Normal Eye fatigued Persistence. with X -570 /i. Persistence. with \-b70fi ■735/x •0337 sec. ■0320 sec. •522 /( ■0164 sec ■0163 sec. •690 •0221 •0224 1 ■495 •0209 ■0205 •647 •0167 ■0168 j ■453 ■0360 ■0365 •0137 ■ 1 •423 •0538 ■0554 •553 •0141 ■0146 •410 ■0620 ... •535 ■0153 ...
. Physical researches on sensation [by] Frank Allen [and others]. / 0 l\ 1111 0 .020 1 . 1 OlS \ L / A/ V, ^ 4- WAVE L010 4\0^ 4 0 .6 S .6 0 e S .7 0 ys red and green elevation type, it was evident that the transitionpoint must be near X570/^. This hue was then used as the Table VII. X. Normal Eye fatigued X Normal Eye fatigued Persistence. with X -570 /i. Persistence. with \-b70fi ■735/x •0337 sec. ■0320 sec. •522 /( ■0164 sec ■0163 sec. •690 •0221 •0224 1 ■495 •0209 ■0205 •647 •0167 ■0168 j ■453 ■0360 ■0365 •0137 ■ 1 •423 •0538 ■0554 •553 •0141 ■0146 •410 ■0620 ... •535 ■0153 ... Sfteehtnu ,nt(i tlif J^rimaiy (olottv Seiiitiitionf. tati;^iiiii;; , ,1, till result; ;j;iveii in Tahh* \I I. obtainedfiMiii which the ciirv** in i\\i. \l i- |ih)tt((l. Tliis curve, likithat fur tlic Hi>t transition point, lias nowKvations, l)iit cuinciiles at all points with tin* normal. Fi-. li>. ■06 •05 •04 c;o •03 02 •01 Fcitigue colour 570pLNormal — — —Fatigue. •50 -60 Wai/e Length. It was now certain that two more tran>ition |)oints existed,one hetween the single Lrreen ehvation tv|>e of enrvo. -^mAxas that for tli(> wavo-leniith \.)2(l^. liij. \\\, mikI the tlouhli-ofeen ami violet elevation Ivpe, lik. that for the wave-length\I10^, tiij. lii; and the other markin;^ the transition from I, .) 6S Prof. F. Allen on Four Transition Point.^ in the this latter tjpe of curve to the single violet elevation typeexhibited by that obtained for the wave-length \400 17, which was known from previous work*. Fio-. 13. \ \ \\ \\ *n , \\ zoo UJ cV L to \ • ^ \ / 1 \ y k ^ EYEGREE FATIGUED WITH NOR^ itAI . 4 OM .5 WAV0 E LENT THS. 0 ; 0 In the process of narrowing down the third transition * Note.—Tlie readings obtained ^vhe^ the eye was fatioued with thewave-lengths \440 )it and X-400/t are given in the paper already referredto, viz.: Effect on Persistence of Vision, et
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