File:Crookes' type discharge tubes Wellcome M0015832EA.jpg
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current | 14:32, 24 October 2014 | 3,024 × 3,513 (1.79 MB) | Fæ | =={{int:filedesc}}== {{Artwork |artist = |author = |title = Crookes' type discharge tubes |description = Crookes' type discharge tube with anode in shape of Maltese Cross for demonstrating that cathode rays t... |
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