. The American journal of anatomy. diffuse blue stain and the Xissls bodies appearing partly yet these bodies are plainly there. The differentiation can becarried to a point wdiere the cells of the stimulated retinae have lost theblue stain completely, the Xissls bodies in the cells of the resting retinaestill retaining some of the stain. This can be accounted for by anactual diminution of the substance: that is, a change from the chromo-phile to a non-chromophile condition without any intermediate states,in the cells of the stimulated retinae; for, provided the differentiationfluids
. The American journal of anatomy. diffuse blue stain and the Xissls bodies appearing partly yet these bodies are plainly there. The differentiation can becarried to a point wdiere the cells of the stimulated retinae have lost theblue stain completely, the Xissls bodies in the cells of the resting retinaestill retaining some of the stain. This can be accounted for by anactual diminution of the substance: that is, a change from the chromo-phile to a non-chromophile condition without any intermediate states,in the cells of the stimulated retinae; for, provided the differentiationfluids diffuse with ecpial rapidity through tlie resting and the stimu-lated cells, the cells having the less amount of the chromophile materialwill be decolored the sooner. But it could also be explained on theassum]ition that in prolonged activity of the cell the affinity of a mole-cule op the Xissls substance for the stain is gradual][i reduced, to be NISSLS SUBSTANCE IN THE BIRD RETINA. A. J. CARLSON. PLATE I. £.nr«it&> (^^. .?r*T^^,yi \^- -#?-•.\ lb. ^^ ^%
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1901
