{"value"=>"<p>Series forms the most extensive and complete section of Sprague's papers. The general correspondence, 1913-1933, contains letters to and from the American Railway Association (1921-1924), W. C. Burton (1920), Harold C. Cockerline (1914-1917), General Electric Company (1913-1920), the Interstate Commerce Commission (1915-1927), John P. Kelley (1916-1926), New York State Transit Commission (1922-1933), Public Service Commission (1915-1924), and the U. S. Railroad Administration (19181920), as well as letters concerning the Railway Bill (1919-1920).</p> <p>The correspondence of the Chicago Office, 1922-1927, consists of letters to F. Desmond Sprague from Frank Sprague and others, and copies of his replies. Additional correspondence can be found in two scrapbooks.</p> <p>Included also are laboratory and shop test records, notebooks and daily work diaries of company engineers, and project files. The project files consist of correspondence with railroad companies, bids, contracts, and inspection reports on the installation of the Sprague automatic train control system on the New York Central, Great Northern, and other railroads. There are extensive patent and patent interference case records, minutes and other papers on Interstate Commerce Commission hearings on automatic train control, and eight scrapbooks of clippings and printed material.</p>"}