- 1877 to 18791,352
- 1880 to 18811,309
- 1882 to 18841,434
- 1885 to 18861,283
- 1887 to 18892,251
- 1890 to 18913,138
- 1892 to 18942,741
- 1895 to 18962,736
- 1897 to 18993,264
- 19002,935
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