| Wilhelm Konrad Röntgen The shadows of a concealed wire wound on a wooden spool, viewed through x-ray. Photoprint from radiograph by W.K. von Röntgen, 1895. 1895 X-ray 18.1 x 13 cm Wellcome Collection Wellcome Library, London (V0029524, Library reference no.: ICV No 30004) LL/36725
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