RT Unpublished Material DB /z-wcorg/ DS http://worldcat.org ID 154306265 LA Some materials in German and French. A1 Placzek, G., YR 1934 AB Contains correspondence; typescripts and manuscripts; scientific papers; research notes and mathematical calculations. Undated manuscript drafts of papers on nuclear physics, including an untitled paper on the compound nucleus. Collection of scientific papers (1950-1954) by others, dealing with research on atomic and molecular structures. Research notes and detailed algebraic calculations (probably circa 1950s but undated) concern Placzek's work on neutron scattering of crystals and the theory of Bose gases. Correspondence (1934-1952) both personal and professional, a portion of which details his interest in the study of Piero della Francesca's works on geometry at the Vatican, including a letter of recommendation to the conservator of the Vatican manuscripts, a description of the manuscripts, and reference notes. Correspondents include: Hans A. Bethe, Niels Bohr, Subrahmanyan Chandrasekhar, Sir James Chadwick, Sir John Douglas Cockcroft, and Richard C. Tolman.