- 1885 to 18892,463
- 1890 to 18943,232
- 1895 to 18993,278
- 1900 to 19043,304
- 1905 to 19093,213
- 1910 to 19143,840
- 1915 to 19174,507
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