- 1870 to 187439
- 1875 to 187939
- 1880 to 188439
- 1885 to 188939
- 1890 to 189439
- 1895 to 189939
- 1900 to 190439
- 1905 to 190939
- 1910 to 191439
- 1915 to 191939
- 1920 to 192439
- 1925 to 192939
- 193039
The preservation of the Duke University Libraries Digital Collections and the Duke Digital Repository programs are supported in part by the Lowell and Eileen Aptman Digital Preservation Fund