Note 15 — The First Self-Registering Instruments
Reading edition
Battista della Valle, Vallo Libro Continente Appertiniente ad Capitanii, Retenere and Fortificare una Citta..., Venetia, 1523 (reported under the date 1524 in G. H. Baillie, Clocks and Watches, an Historical Bibliography, London, 1951).