Typed letter from Thomas O. Perry to Charles F., Sr., thanking Brush for sending a copy of his paper, Kinetic Theory of Gravitation III, to Perry, who Show moreTyped letter from Thomas O. Perry to Charles F., Sr., thanking Brush for sending a copy of his paper, Kinetic Theory of Gravitation III, to Perry, who asks Brush about radio-activity in relation to the paper and experiment, as well as mentions the work The Luminiferous Ether by Professor DeVolson Wood and Professor R. H. Thurston, who admired DeVolson as a thermodynamist Charles F. Brush, Sr., Papers Series 1: Correspondence Subseries 2: Acknowledgments (1921-1929) Box 3 Folder 4 Show less
Typed letter from Thomas Perry to Charles F., Sr., thanking Brush for sending his latest gravitation paper, remarking on the boldness of challenging N Show moreTyped letter from Thomas Perry to Charles F., Sr., thanking Brush for sending his latest gravitation paper, remarking on the boldness of challenging Newton and also the necessity not to simply trust a great name with some examples of why Charles F. Brush, Sr., Papers Series 1: Correspondence Subseries 2: Acknowledgments (1921-1929) Box 2 Folder 14 Show less