<span>3 Typed and handwritten letters between Sidney Stevens and Charles F., Sr., regarding theories each held concerning the ether as a medium for light and gravitation. Includes letter from Stevens to Leigh Page </span><span>describing Brush's paper on gravitation which Stevens felt would satisfy Page's mathematical issues with ether.Charles F. Brush, Sr., PapersSeries 1: CorrespondenceSubseries 3: Business and Professional (1876-1931)Box 5Folder 18</span>

Stevens, Sidney, 1924

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