US Patent No. 978,878, granted Dec. 20, 1910 to Giuseppe Guadagni of Pavia, Italy, for a process of making artificial silk from cellulose. Cellulose is dissolved in a cupro-ammonium solution with excess copper hydrate, aided by compressed air. The solution is forced through capillary tubes into an acid coagulant bath of sulfuric and hydrochloric acids, and the filament is wound on bobbins and washed. It includes two sheets of drawings of the dissolving vessel, filament-forming device and winding apparatus, plus the specification and two claims.