Popular lectures on scientific subjects. 2nd ser. / by Hermann von Helmholtz ; translated by E. Atkinson.
- Helmholtz, Hermann von, 1821-1894.
- Date:
- 1893
Licence: Public Domain Mark
Credit: Popular lectures on scientific subjects. 2nd ser. / by Hermann von Helmholtz ; translated by E. Atkinson. Source: Wellcome Collection.
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