Typed letter from Theodore Lyman to Charles F., Sr., thanking Brush for sending a copy of his paper on Persistent Generation of Heat in Some Rocks to Show moreTyped letter from Theodore Lyman to Charles F., Sr., thanking Brush for sending a copy of his paper on Persistent Generation of Heat in Some Rocks to Lyman Charles F. Brush, Sr., Papers Series 1: Correspondence Subseries 2: Acknowledgments (1921-1929) Box 3 Folder 5 Show less
Typed letter from Charles A. Darius to Charles F., Sr., thanking Brush for sending a copy of his paper on Persistent Generation of Heat in Some Rocks Show moreTyped letter from Charles A. Darius to Charles F., Sr., thanking Brush for sending a copy of his paper on Persistent Generation of Heat in Some Rocks to Darius Charles F. Brush, Sr., Papers Series 1: Correspondence Subseries 2: Acknowledgments (1921-1929) Box 3 Folder 5 Show less
Handwritten letter from J. M. Gelston to Charles F., Sr., thanking Brush for sending a copy of his paper on Persistent Generation of Heat in Some Rock Show moreHandwritten letter from J. M. Gelston to Charles F., Sr., thanking Brush for sending a copy of his paper on Persistent Generation of Heat in Some Rocks to Gelston Charles F. Brush, Sr., Papers Series 1: Correspondence Subseries 2: Acknowledgments (1921-1929) Box 3 Folder 5 Show less