Abstract
IN the course of some cinematographic tests, I observed a visual effect which may be of some interest to readers of NATURE and is probably open to a ready explanation.
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PENDRED, L. An Optical Illusion. Nature 141, 1018 (1938). https://doi.org/10.1038/1411018a0
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DOI: https://doi.org/10.1038/1411018a0
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