. Physical researches on sensation [by] Frank Allen [and others]. no other 70 Prof. F. Allen 071 Four Transition Poiiits in the Fio-. U. o CDCO I J 04 1 1 9 Fatigue colour 480JLL ? \ Norma/ 1 f~ /-• - 03 \ razi yu«= > \ • \\ p •02 \\ . \\ \\ / VV // k ■ X*^_s, •01 •40/x •50 -60 Wave Length. •70 Table X. X. Normal Eye fatigued X. Normal Eve fatigued Persistencp. with X-420 ;k. Persistence. with X ■420>. •705 Jit •026-_ sec. •020-_ sec. •465 /( ■0275 sec. ... ■665 •0169 ■0175 •448 ■0336 ■0339 see. ■626 ■0144 •430 ■0392 ■0385 •577 •0]4ii •0145 1 •424 ... •0415 ■540 •0156 • •417 •04
. Physical researches on sensation [by] Frank Allen [and others]. no other 70 Prof. F. Allen 071 Four Transition Poiiits in the Fio-. U. o CDCO I J 04 1 1 9 Fatigue colour 480JLL ? \ Norma/ 1 f~ /-• - 03 \ razi yu«= > \ • \\ p •02 \\ . \\ \\ / VV // k ■ X*^_s, •01 •40/x •50 -60 Wave Length. •70 Table X. X. Normal Eye fatigued X. Normal Eve fatigued Persistencp. with X-420 ;k. Persistence. with X ■420>. •705 Jit •026-_ sec. •020-_ sec. •465 /( ■0275 sec. ... ■665 •0169 ■0175 •448 ■0336 ■0339 see. ■626 ■0144 •430 ■0392 ■0385 •577 •0]4ii •0145 1 •424 ... •0415 ■540 •0156 • •417 •0450 •0446 ■512 ■0188 ■0179 •410 ... •0487 •488 •0219 •0215 •405 ■0530 •0530 Speitritin and the Iriniuri/ ( ulutir ^iifattotiS. » are shownill Tahle X. and plottctl in fi;j. IS. Thi» curvi- id withoutaiiv iiidifatiuii of ehvations, and eoincid«*f:hoiit itscourse with thf nurtnal. Fiif. i:... A-Ojj. 50 -60 Wave Length. Ill onler to oxhiliil tiif\ iiiIkreh«ii;>ivelv in a -iinple figure(tio. 19). tliev have all heen replotted so as to make th«normal curve a straijiht line l»v roiluoinji it- scale in all 72 Prof. F. Allen o)t Four Transition Points in the parts to the arbitrary value of lOt), and the values of theabnormal curves in the same ratio. Slight departures ofthe abnormal from the normal curves have been ignored. Fig. 16. J I i \ 11 ^D25- ll \\ ozoo Is cfl \ f tOI 5 \ s / /o - K\ »> y Y •i^^^ EYE F »T1GU ED WIT H BLUENORM \\ - — ■ \pu t WAVE)0 LENG6 .70 lono experience having shown that thev are without signi-ficance, and to be attributed rather to the inevitable errors ofobservation. The elevations of the curves, both single and double, canbe readily recognized and compared, and their limiting wave-lengths noted. As they are arranged in ascending order ofwave-lengthsj wi
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphysiol, bookyear1902
