- 1877 to 18791,348
- 1880 to 18811,304
- 1882 to 18841,432
- 1885 to 18861,276
- 1887 to 18892,249
- 1890 to 18913,136
- 1892 to 18942,739
- 1895 to 18962,733
- 1897 to 18993,262
- 19002,933
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