Royal Academy of Arts (Great Britain), Blackburn, Henry, 1830-1897, ed · London : Chatto and Windus · leaf 148
■aHf^-^^ … IF you look at the star ^ (in a good light) for 20seconds and immediately afterwards at the blankspace below, the latter will very slowly assume aBiueish Green tint, in the middle of which PEARS willre-appear, but in Red letters instead of White. S OME colour-blind persons having written in very…
Art
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