Note 61 — DEVELOPMENT OF GRAVITY PENDULUMS IN THE 19th CENTURY

The experiments at the Stevens Institute, Hoboken, were reported by Peirce to the Permanent Commission which met in Hamburg, September 4-8, 1878, and his report was published in the general Bericht for 1878 in the Verhandlungen der vom 4 bis 8 September 1878 in Hamburg Vereinigten Permanenten Commission der Europäischen Gradmessung (Berlin, 1879), pp. 116-120. Assistant J. E. Hilgard attended for the U.S. Coast and Geodetic Survey. The experiments are described in detail in C. S. Peirce, “On the Flexure of Pendulum Supports,” Report of the Superintendent of the U.S. Coast and Geodetic Survey for 1880-81 (Washington, 1883), app. no. 14, pp. 359-441.