Radio engineer and manufacturer. Correspondence, diaries, blueprints, sketches, plans, notebooks, company files, photographs, reports, clippings, and printed matter largely related to Eastham’s career as a radio engineer and as head of the General Radio Company, but also to his avocation of collecting early maps and atlases.

Manufacturer and retailer of farm goods, chairman of the La Follette for President Committee, and Robert M. La Follette's campaign treasurer. Correspondence, financial records, lists, charts, promotional material, and others papers relating to the 1924 presidential campaign of Robert M. La Follette (1855-1925).

Engineer and manufacturer. Correspondence, speeches, articles, books, newspaper clippings, and other papers reflecting Tompkins's views on the economic development of the South and relating to public issues of the early twentieth century.