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The Movement of the Positive After-image

Abstract

THERE is no doubt that movement of the positive after-image takes place without movement of the eyes as Mr. H. S. Ryland states (NATURE, November 18, p. 668). His experiment is complicated by the fact that all portions of the light shown have not the same intensity, causing a corresponding difference in the after-image.

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EDRIDGE-GREEN, F. The Movement of the Positive After-image. Nature 110, 772 (1922). https://doi.org/10.1038/110772b0

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