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'Crookes, Rontgen and Finsen - Using the Marvellous X-Rays Apparatus', c1925. Artist: Unknown.
'Crookes, Rontgen and Finsen - Using the Marvellous X-Rays Apparatus', c1925. Niels T. Finsen, (1860-1904). From Cassell's Romance of Famous Lives, Volume 2 by Harold...
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