2 Typed letters between A. Steckel and Charles F., Sr., discussing Brush's gravitation theories, and a blunder Steckel found in earlier work by Maxwel Show more2 Typed letters between A. Steckel and Charles F., Sr., discussing Brush's gravitation theories, and a blunder Steckel found in earlier work by Maxwell and Kelvin. Charles F. Brush, Sr., Papers Series 1: Correspondence Subseries 3: Business and Professional (1876-1931) Box 5 Folder 17 Show less
