Koenigsberger, Leo, 1837-1921. Hermann von Helmholtz / by Leo Koeningsberger ; translated by Francis A. Welby ; with a preface by Lord Kelvin.

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Koenigsberger, Leo, 1837-1921.

Hermann von Helmholtz / by Leo Koeningsberger ; translated by Francis A. Welby ; with a preface by Lord Kelvin.

Helmholtz, Hermann von, 1821-1894

Physicists -- Biography.

Welby, Francis A.