<span>Handwritten letter from John Millis to Charles F., Sr., thanking Brush for sending a copy to Millis of the address Brush gave on evidence supporting the </span><span>kinetic theory of gravity, at the Franklin InstituteCharles F. Brush, Sr., PapersSeries 1: CorrespondenceSubseries 2: Acknowledgments (1921-1929)Box 3Folder 6</span>
Acknowledgements for Brush's address "Some Experimental Evidence Supporting the Kinetic Theory of Gravitation," delivered at the Franklin Institute upon Receiving Franklin Metal, May 16, 1928
Acknowledgements for Brush's address "Some Experimental Evidence Supporting the Kinetic Theory of Gravitation," delivered at the Franklin Institute upon Receiving Franklin Metal, May 16, 1928