Drawing instruments (compasses, pencils) inside a case: radiograph from outside the case. Photograph by Sir Gervas Powell Glyn, 6th Bart., ca. 1896.

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Drawing instruments (compasses, pencils) inside a case: radiograph from outside the case. Photograph by Sir Gervas Powell Glyn, 6th Bart., ca. 1896. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.