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Adolf Eugen Fick

    Adolf Eugen Fick (1829-1901) was a German physiologist and inventor. He is best known for his 1887 invention of the contact lens. In 1855 he introduced Fick's law of diffusion, which governs the diffusion of a gas across a fluid membrane. In 1870 he was the first to devise a technique for measuring cardiac output, called the Fick Principle.
    Interestingly, Fick managed to double-publish his law of diffusion, as it applied equally to physiology and physics.