Ruling Machine Screws; Discovery of Asteroids 112 and 109 & Ephemerides, 1870/1876 Digital

Ruling Machine Screws; Discovery of Asteroids 112 and 109 & Ephemerides, 1870/1876. Harvard College Observatory observations, logs, instrument readings, and calculations, KG11365-6, phaedra0430, Box: 11. Wolbach Archives, Wolbach Library, Harvard University. https://id.lib.harvard.edu/ead/c/wol00001c10541/catalog Accessed May 01, 2024.