Typed letter from L. Bush to Charles F., Sr., thanking Charles for sending latest gravitation paper Charles F. Brush, Sr., Papers Series 1: Corresponden Show moreTyped letter from L. Bush to Charles F., Sr., thanking Charles for sending latest gravitation paper Charles F. Brush, Sr., Papers Series 1: Correspondence Subseries 2: Acknowledgments (1921-1929) Box 2 Folder 13 Show less
Typed letter from L. Bush to Charles F., Sr., thanking Charles for sending latest gravitation paper, and expressing his interest in the field as a lay Show moreTyped letter from L. Bush to Charles F., Sr., thanking Charles for sending latest gravitation paper, and expressing his interest in the field as a layman Charles F. Brush, Sr., Papers Series 1: Correspondence Subseries 2: Acknowledgments (1921-1929) Box 2 Folder 14 Show less