54 Typed letters between Charles F., Sr., various members of the General Electric Company, P. Wold, and students at Union College, written in 1926, 19 Show more54 Typed letters between Charles F., Sr., various members of the General Electric Company, P. Wold, and students at Union College, written in 1926, 1927, 1928, and 1929, regarding attempts to repeat Brush's free-fall experiments on gravitation, ideas for new apparatuses and refinements on the experiments, and results of other experiments, ending only with Brush's death in June 1929. Several letters includes diagrams of the new apparatuses and charts of results. Charles F. Brush, Sr., Papers Series 1: Correspondence Subseries 3: Business and Professional (1876-1931) Box 4 Folder 10 Show less
