Note 74 — DEVELOPMENT OF GRAVITY PENDULUMS IN THE 19th CENTURY
Reading edition
Report of the Superintendent of the U.S. Coast and Geodetic Survey for 1880-81 (Washington, 1883), p. 26.
Reading edition
Report of the Superintendent of the U.S. Coast and Geodetic Survey for 1880-81 (Washington, 1883), p. 26.