Prisms Aid Bed Readerw, 1936 Ağustos 10, 2023 1930s, inventions, WTF To make reading in bed easier, a British inventor has devised “lying-down” spectacles in 1936. Prisms mounted in eyeglass frames bend the light rays at right angles so that the wearer can lie flat and read a book held upright on his chest. Bunu E-postayla GönderBlogThis!X'te paylaşFacebook'ta Paylaş
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