| T-1 | Oct. 1887-Aug. 1889 | |
| T-2 | Aug. 1889-May 1890 | |
| T-3 | April 1890-March 1891 | |
| T-4 | March 1891-Feb. 1892 | |
| T-5 | Feb. 1892-April 1893 | |
| T-6 | April 1893-March 1894 | |
| T-7 | March 1894-Dec. 1894 | |
| T-8 | Dec. 1894-Aug. 1895 | |
| T-9 | May 1895-Nov. 1895 | |
| T-10 | Nov. 1895-April 1896 | |
| T-11 | April 1896-Sept. 1896 | |
| T-12 | Sept. 1896-Jan. 1897 | |
| T-13 | Jan. 1897-May 1897 | |
| T-14 | May 1897-Dec. 1897 | |
| T-15 | Dec. 1897-July 1898 | |
| T-16 | June 1898-Feb. 1899 | |
| T-17 | Feb. 1899-Oct. 1899 | |
| T-18 | Oct. 1899-June 1900 | |
| T-19 | June 1900-June 1901 | |
| T-20 | June 1901-April 1902 | |
| T-21 | April 1902-Jan. 1903 | |
| T-22 | Jan. 1903-Oct. 1903 | |
| T-23 | Oct. 1903-June 1904 | |
| T-24 | June 1904-Feb. 1905 | |
| T-25 | Feb. 1905-Nov. 1905 | |
| T-26 | Nov. 1905-May 1906 | |
| T-27 | May 1906-Feb. 1907 | |
| T-28 | Feb. 1907 |
Contact us at osiaref@si.edu
Revised: August 1, 2002