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Published online by Cambridge University Press: 15 September 2014
The author had noticed that a jet of mercury from a funnel, falling horizontally and nearly tangentially on a slightly inclined glass plate, seemed to roll upwards along the plate. Attributing this to a rotation of the jet, he endeavoured, with success, to re-produce the phenomenon with water jets escaping from a rapidly rotating tube, and falling on a slightly inclined glass surface covered with a thin layer of paraffin.