- 1870 to 187414
- 1875 to 187914
- 1880 to 188421
- 1885 to 188921
- 1890 to 189421
- 1895 to 189914
- 1900 to 190414
- 1905 to 190914
- 1910 to 191414
- 1915 to 191914
- 1920 to 192414
- 1925 to 192914
- 193014
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