- 1872 to 18741,611
- 1875 to 18761,380
- 1877 to 18791,336
- 1880 to 18811,293
- 1882 to 18841,421
- 1885 to 18861,263
- 1887 to 18892,238
- 1890 to 18912,972
- 1892 to 18942,573
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