Arrangement
The collection is arranged into ten series.
Series 1: Background Materials, 1889-1980
Series 2: Letter Books, 1895-1901
Series 3: Sketches, 1900-1941
Series 4: Shop Books, 1897-1924
Series 5: Calculation Books and Sheets, 1903-1915
Series 6: Drawings, 1899-1922
Series 7: Instructions, 1899-1941
Series 8: Technical Data, 1901-1923
Series 9: Photographs, 1915