. Physical researches on sensation [by] Frank Allen [and others]. ¢!.â¢!â¢_⢠iiH â¢(ti:,7 â 1-i:. .5. â¢U:)i:i ... t3 OO <0 045 t I £ye fiitigued wi\ \h 1 X 6S//J. I Nnrrn;:il â â â 040 1 \\ I 035 1 / / *â 030 ⢠\ 1/ / \ / / \ / / \ f 1 025 \ \ ⢠\ / f \ // \ // 020 \ It V r / J X \ ^ i A \ \ // 015 ** ***^â¢^â¢C^^ jC ^ 1 â¢40;/ 45 â¢50 55 60 65Wji/e Length. â¢70 No elevation? at all a|i]VarU:lioiit tlifir length. Thissurprising result at tir>t Mas taki-n to indicate that the eye 62 Prof. F. Allen on Fovr Transition Points in the had not been sufficiently fatigued or that the r
. Physical researches on sensation [by] Frank Allen [and others]. ¢!.â¢!â¢_⢠iiH â¢(ti:,7 â 1-i:. .5. â¢U:)i:i ... t3 OO <0 045 t I £ye fiitigued wi\ \h 1 X 6S//J. I Nnrrn;:il â â â 040 1 \\ I 035 1 / / *â 030 ⢠\ 1/ / \ / / \ / / \ f 1 025 \ \ ⢠\ / f \ // \ // 020 \ It V r / J X \ ^ i A \ \ // 015 ** ***^â¢^â¢C^^ jC ^ 1 â¢40;/ 45 â¢50 55 60 65Wji/e Length. â¢70 No elevation? at all a|i]VarU:lioiit tlifir length. Thissurprising result at tir>t Mas taki-n to indicate that the eye 62 Prof. F. Allen on Fovr Transition Points in the had not been sufficiently fatigued or that the readings werenot properly taken. With the greatest care the whole of thereadings were repeated on the following day with exactly thesame result. The remarkable conclusion follows, that fatiguingthe eye with a narrow band of colour whose central wave-length is \GGO /ji, has not the slightest perceptible effect on Fig. 6. â¢045 â¢040 â¢035 â¢03-0 t5coo to -025 â¢020 -Oil. Wave Length. the measurement of the persistence of vision for any part ofthe spectrum. This Avave-length, A,660/i*, is therefore thetransition point between curves of the single red elevationtype and those of the double red and green elevation type. spectrum and the Iriinary Colour Sensations. Fig-. 7. USB I G3
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphysiol, bookyear1902
