AEROSTATION. [Gaston TISSANDIER (1843-1899), 2 documents concerning a patent, 1881; 4 and 1 fol. pages, headings. Patent for "the new application of electricity to air navigation". July 30, 1881, request for a certificate of addition to the 15-year patent granted on June 9, 1881, with "descriptive memorandum", signed on Tissandier's behalf by engineer Émile Barrault, of the Office international pour la prise de Brevets d'invention en France et à l'étranger. - October 28, 1881. Order of the Minister of Agriculture and Commerce issuing the certificate, with sketch on tracing paper (torn). - Plus 2 attached receipts.