This series contains Elmer Sperry's correspondence with a number of prominent scientists, politicians and business people. Letters to Herbert Hoover and John D. Rockefeller, Jr., outline Sperry's political, economic, and social world views. Correspondence with Albert A. Michelson (University of Chicago), David Eugene Smith (Columbia University) and Elihu Thomson (Thomson-Houston Company) develops Sperry's ideas about the relationship between science and technology. Also included is a letter to Mussolini.