Note 72 — DEVELOPMENT OF GRAVITY PENDULUMS IN THE 19th CENTURY
Reading edition
Ibid., app. 6. See also, Zeitschrift für Instrumentenkunde (1884), vol. 4, pp. 303 and 379.
Reading edition
Ibid., app. 6. See also, Zeitschrift für Instrumentenkunde (1884), vol. 4, pp. 303 and 379.