Note 110 — DEVELOPMENT OF GRAVITY PENDULUMS IN THE 19th CENTURY (continued 2)

C. S. Peirce, “On the Deduction of the Ellipticity of the Earth, from Pendulum Experiments,” Report of the Superintendent of the U.S. Coast and Geodetic Survey for 1880-81 (Washington, 1883), app. no. 15, pp. 442-456.