(1799). DAL NEGRO (Salvator). NUOVO METODO DI COSTRUIRE MACCHINE ELETTRICHE DI GRANDEZZA ILLIMITATA... Venice, Pietro Zerletti, 1799. In-8 of 32-112 pages, paperback, untrimmed, modern folder and slipcase. ORIGINAL EDITION with a preface outlining the development of electrical theories in the 18th century, up to Volta and Galvani. The work then describes the construction of a type of electrical machine designed by the author, the experiments carried out with it, and finally the electric battery. A very large engraved plate shows the famous machine.