Smithsonian Institution - United States National Museum - Bulletin 240 / Contributions From the Museum of History and Technology / Papers 34-44 on Science and Technology

by Museum of History and Technology

Figure 31.—Pendulum arrangement sketch for an unidentified clock found in Bertolla's workshop. (Courtesy of Museo Nazionale della Scienza e della Tecnica, Milan.)

Figure 32.—Striking clock sketch found in Bertolla's manuscripts. (Courtesy of Museo Nazionale della Scienza e della Tecnica, Milan.)