180 - [MANUSCRIPTS]

[MANUSCRIPTS] ARCHIVES of Dimitri RIABOUCHINSKY RIABOUCHINSKY, Dimitri (1882–1962) – Autograph Collection of manuscripts and scientific studies by Dimitri Riabouchinsky. Includes: • Excerpt from a work on parabolic and hyperbolic geometry. Manuscript containing drawings and corrections, as well as a few fragments of typewritten text. In French, 43 pp. in total, 27 × 21 cm, as is; excerpt from a work on parabolic and hyperbolic geometry. Typewritten text containing corrections, formulas, and calculations written by hand. In French, 31½ pp. in total, 27 × 21 cm; excerpts from the text’s chapters are stapled together, and several lengthy passages of the text are handwritten, as is. • Preparatory text for the first part of a scientific work titled “Application of Generalized Complex Numbers in Algebra, Geometry, and Analysis.” Typewritten text containing extensive handwritten passages, in French. 7 pp., 27 x 21 cm, as is; loose pages from the aforementioned works. Manuscripts, in French, 9 pp. in total, various sizes, as is. • Two drawings on tracing paper. Plate titled “Carbon Dioxide at Different Pressures,” annotated in French, 49 x 73 cm, as is; on the second plate, the title is missing, 48 x 73 cm, as is (a significant portion of the sheet is missing). [MANUSCRIPTS] ARCHIVE OF Dmitry RYABUSHINSKY RYABUSHINSKY, Dmitry (1882–1962) – Autograph A collection of manuscripts and scholarly studies by Dmitry Ryabushinsky. Includes: • An excerpt from a work on parabolic and hyperbolic geometry. Manuscript with drawings and corrections, several fragments of typewritten text. In French, 43 pages total, 27 × 21 cm, bound; an excerpt from a work on parabolic and hyperbolic geometry. Typewritten text with corrections; formulas and calculations written in by hand. In French, 31½ pages total, 27 × 21 cm; fragments of the main text are held together with paper clips; several substantial sections of text are handwritten; in its original condition. • Draft of the first part of a scholarly work titled “The Application of Generalized Complex Numbers in Algebra, Geometry, and Analysis.” Typewritten text with significant handwritten sections, in French. Total of 7 pages, 27 × 21 cm, in the collection; scattered pages from the above-mentioned studies. Manuscript, in French, total of 9 pages, various sizes, in the collection. • Two graphs, drawings on tracing paper. Sheet titled “Carbon Dioxide at Various Pressures,” annotated in French, 49 × 73 cm, complete; the second sheet has no title, 48 × 73 cm, complete (a significant portion of the sheet is missing).