Hermann von Helmholtz

On the Facts Underlying Geometry

Hermann von Helmholtz, H. Helmholtz, 1977 .

On the Sensations of Tone

Hermann von Helmholtz, H. Helmholtz, 1954 .

I.—The Origin and Meaning of Geometrical Axioms

Hermann von Helmholtz, H. Helmholtz, 1876 .

Popular lectures on scientific subjects. Second series.

Hermann von Helmholtz, H. Helmholtz, E. Atkinson, 2022 .

Counting and measuring

Hermann von Helmholtz, H. Helmholtz, Charlotte Lowe Bryan, 2022 .

Numbering and Measuring from an Epistemological Viewpoint

Hermann von Helmholtz, H. Helmholtz, 1977 .