. Physical researches on sensation [by] Frank Allen [and others]. looico c°±°ri-Lri-:.r-:zJs-i -. S06f, Z P ttio^ •^0^ .,^5- 50 Ji iO tS -JoIii;. IS. KtdiuirJ Rciicx Ciirres, In these exi)erinienls the fatigue was isolateil in one eye. and theretlex etYects. which occur in both, were isolated in the other, andtheretore can be studied i)y themselves. We are justified in con-cluding that every ray of ligiit excites in the visual apparatus reciprocalor retlex ctTects which enhance the brightness of three parts of the spec-trum corresponding to red, green, and violet. It is probable that the 600 F

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. Physical researches on sensation [by] Frank Allen [and others]. looico c°±°ri-Lri-:.r-:zJs-i -. S06f, Z P ttio^ •^0^ .,^5- 50 Ji iO tS -JoIii;. IS. KtdiuirJ Rciicx Ciirres, In these exi)erinienls the fatigue was isolateil in one eye. and theretlex etYects. which occur in both, were isolated in the other, andtheretore can be studied i)y themselves. We are justified in con-cluding that every ray of ligiit excites in the visual apparatus reciprocalor retlex ctTects which enhance the brightness of three parts of the spec-trum corresponding to red, green, and violet. It is probable that the 600 Frank Allen [ & , 7 relative actions on the three sensations vary with the exciting color,and range from the pronounced effects described in these experimentsto the refined gradations accompanying the most delicate shades ofcolor. The magnitude of the reflex sensations seems to be propor-tional to some extent to the luminosity of the color stimulus, butvaries to a far greater extent inversely as some function of the wavelength. The strong reflex effects of the violet probab

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphysiol, bookyear1902