| Description | Manuscript and typescript. About Pearson's Grammar of Science, about photographing diffraction of light and method used [this letter is in English], about sending Pearson the new editions of his books Principles of Thermodynamics and Analysis of the Sensations, on a proposed German translation by Dr Kleinpeter of Grammar of Science and attempts to find a publisher, and enclosing a portrait photograph of Ernst Mach and a portrait photograph of Sir William Hamilton.
Contains typed translations of the letters written in German. |