. Physical researches on sensation [by] Frank Allen [and others]. •ig. \o. Fl£. 16. comparison with a new normal curve of the writer, the determina-tion of which was rendered necessary by a change in the pressureof the acetylene and constquentl}- a change in the luminosity of thespectrum. The form of the curves is the same for both eyes, both showingthe same peculiarities. It may be possible that this is the cur\e ofthe typical red-blind subject. I^rry, however, in the article cited,found cur\es slightly different from these for red-blind j>ersons. Inhis curves there were no elevations in t
. Physical researches on sensation [by] Frank Allen [and others]. •ig. \o. Fl£. 16. comparison with a new normal curve of the writer, the determina-tion of which was rendered necessary by a change in the pressureof the acetylene and constquentl}- a change in the luminosity of thespectrum. The form of the curves is the same for both eyes, both showingthe same peculiarities. It may be possible that this is the cur\e ofthe typical red-blind subject. I^rry, however, in the article cited,found cur\es slightly different from these for red-blind j>ersons. Inhis curves there were no elevations in the yellow-green part of thespectrum. The cur\c for the normal eye (Fig. 6). fatigued withred, shows the increased persistence of the red though not to the 286 FRANK ALLEN. [Vol. XI. same extent as the naturally color-blind subject. No disturbanceof the curve occurs in any other XII gives the data for the left eye. Table XII. S. W. F. {left eye). ■Wave length. Persistence. Wave length. Persistence. .410 11 .0307 sec. .550 ix .0122 sec. .455 .0216
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