Typed letter from Mildred G. Drews to Charles F., Sr., thanking Brush on behalf of Joel B. Hayden for sending a copy of the paper, Persistent Generati Show moreTyped letter from Mildred G. Drews to Charles F., Sr., thanking Brush on behalf of Joel B. Hayden for sending a copy of the paper, Persistent Generation of Heat in Some Rocks by Brush, to Hayden Charles F. Brush, Sr., Papers Series 1: Correspondence Subseries 2: Acknowledgments (1921-1929) Box 3 Folder 5 Show less
Typed letter from James R. Garfield to Charles F., Sr., thanking Brush for sending a copy of his paper, Persistent Generation of Heat in Some Rocks, t Show moreTyped letter from James R. Garfield to Charles F., Sr., thanking Brush for sending a copy of his paper, Persistent Generation of Heat in Some Rocks, to Garfield Charles F. Brush, Sr., Papers Series 1: Correspondence Subseries 2: Acknowledgments (1921-1929) Box 3 Folder 5 Show less
Typed letter from Charles F., Sr., to the University Club president thanking him for granting Mr. Brush honorary membership in the club Charles F. Brus Show moreTyped letter from Charles F., Sr., to the University Club president thanking him for granting Mr. Brush honorary membership in the club Charles F. Brush, Sr., Papers Series 1: Correspondence Subseries 1: Family and Personal (1889-1929) Box 2 Folder 6 Show less