Abstract
IN our issue of Feb. 6, p. 197, a note was published referring to Prof. D. F. Fraser-Harris's paper at a recent meeting of the British Psychological Society, in which he described the so-called human aura as the familiar negative after-image produced by temporal retinal induction. Dr. F. W. Edridge-Green has written pointing out that the phenomenon can be shown with white cardboard, and that it and “numerous others of a similar character are due to the movement of the photochemical fluid in the interretinal space. There appears to be a continuous flow towards the centre of the retina when the eyes are being used.” We may add that Prof. E. N. da C. Andrade gave a humorous description of some experiments on this subject in NATURE of Dec. 23, 1922, p. 843. Prof. Andrade used his hand and also cardboard hands and figures, and his conclusion was that the effects were due to after-images, an explanation given of a similar experiment referred to by Dr. Edridge-Green in NATURE of Dec. 9, 1922, p. 772.
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Physiology and the ‘Aura’. Nature 129, 275 (1932). https://doi.org/10.1038/129275b0
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DOI: https://doi.org/10.1038/129275b0