Sources and Sinks


LORD KELVIN in a paper “On the Forces Experienced by Solids Immersed in a Moving Liquid” (Proc. Roy. Soc. Edin., 1870) compared two tubes, with liquid flowing through each, with two hard steel magnets and stated that the forces are opposite in the two cases; unlike poles attracting and like poles repelling in the magnetic system, while in the hydro-kinetic there is attraction between like ends and repulsion between unlike.

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DUFTON, A. Sources and Sinks. Nature 107, 522 (1921).

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