- 1700 to 171989
- 1720 to 173978
- 1740 to 1759100
- 1760 to 1779211
- 1780 to 1799519
- 1800 to 18191,054
- 1820 to 18391,492
- 1840 to 18593,384
- 1860 to 18796,409
- 1880 to 18996,832
- 1900 to 19115,523
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