<span>Typed letter from Harry A. Peters to Charles F., Sr. thanking Brush for sending his fifth paper on gravitation to Peters, who turned it over to the </span><span>Science Department at University School Cleveland.Charles F. Brush, Sr., PapersSeries 1: CorrespondenceSubseries 2: Acknowledgments (1921-1929)Box 3Folder 3</span>

Acknowledgements for Brush's Article "Some New Experiments in Gravitation. Change in Weights of Metals under Strain" (1925 paper), 1925

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