- 1737 to 173955
- 1740 to 175995
- 1760 to 1779184
- 1780 to 1799494
- 1800 to 1819923
- 1820 to 18391,351
- 1840 to 18593,297
- 1860 to 18796,300
- 1880 to 18996,131
- 1900 to 191911,265
- 1920 to 193918,700
- 1940 to 194710,905
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