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Show EYE HAS GREAT SENSITIVITY Wonderful Human Organ Capable of Adapting Itself to Any Possible Circumstances. On enteilpg n dark room nfter n stny In the mithh iluyllght tlie ee nt once hwjln to Increase In sensl-tl sensl-tl lly. At llmt this Increase nppeiir to lie slow, hut nfter fle minutes the In-erenso In-erenso Is quite rapid, the eye acquiring acquir-ing n senslthlty secrn1 hundred tln'es Its Initial i I ue. After .10 minutes' min-utes' Hojourn In the dark the seusltK-Ity seusltK-Ity still Ineiviisex, but more slowly than before, and nfter 4.1 minutes or an hour tho mnxlmum sensitivity Is reached. The flnnl sensitivity varies slightly with different p-ople, Imt In fully adapted condition the ep Is ens-lly ens-lly 5,000 or 10.000 times more sensitive thnu It was nt t h-beginning. Tlu'No fnets are obfalueil from a study of the senidrheiies nf the eye In the ilnik iiuide by Sellg Ilwlit nf Creighlnn lmhrrnlty. OnmliiA, mill published pub-lished In the Journal of (etiernl I'hjslnlog). Mr. Hecht'M study goes Ht show that the Inerensed sensitive-ness sensitive-ness Is due In n reversible phntoch ;m-Unl ;m-Unl lencllon within thorelliui. IiinoIv-Ing IiinoIv-Ing a pholnsensltlMi miIMmiiiv mid Its two products of deconitNisltlon. |