Popular lectures on scientific subjects. Second series / by H. Helmholtz ; translated by E. Atkinson.

Licence: Public Domain Mark

Credit: Popular lectures on scientific subjects. Second series / by H. Helmholtz ; translated by E. Atkinson. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.