~ gathering this author’s shelf ~
7 bookswriting since 186556 years at work
Epistemological writings
1921
The Description of an Ophthalmoscope
1916
Popular Lectures on Scientific Subject
1908
Popular Lectures on Scientific Subjects
1900
On the Sensations of Tone as a Physiological Basis for the Theory of Music
1875
Helmholtz's Treatise on Physiological Optics.
1867
Popular Lectures on Scientific Subjects
1865