File:Crookes radiometer 1926.jpg
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![File:Crookes radiometer 1926.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/1/10/Crookes_radiometer_1926.jpg/245px-Crookes_radiometer_1926.jpg?20140308024215)
Size of this preview: 245 × 598 pixels. Other resolutions: 98 × 240 pixels | 390 × 952 pixels.
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