| | 21 | Name: | Jacques Loeb | | | Year Elected: | 1899 | | | Residency: | Resident | | | Living? : |
Deceased
| | | Birth Date: | 1859 | | | Death Date: | 2/11/24 | | | | |
| 22 | Name: | Arthur S. Mackenzie | | | Year Elected: | 1899 | | | Residency: | International | | | Living? : |
Deceased
| | | | |
| 23 | Name: | Otis T. Mason | | | Year Elected: | 1899 | | | Residency: | Resident | | | Living? : |
Deceased
| | | Birth Date: | 1834 | | | Death Date: | 11/5/08 | | | | |
| 24 | Name: | Albert Matthews | | | Year Elected: | 1899 | | | Class: | 3. Social Sciences | | | Residency: | Resident | | | Living? : |
Deceased
| | | Birth Date: | 1860 | | | Death Date: | 4/13/46 | | | | |
| 25 | Name: | Arthur V. Meigs | | | Year Elected: | 1899 | | | Residency: | Resident | | | Living? : |
Deceased
| | | Birth Date: | 1851 | | | Death Date: | 1/1/1912 | | | | |
| 26 | Name: | Thomas C. Mendenhall | | | Year Elected: | 1899 | | | Residency: | Resident | | | Living? : |
Deceased
| | | Birth Date: | 1841 | | | Death Date: | 3/22/24 | | | | |
| 27 | Name: | Adolf B. Meyer | | | Year Elected: | 1899 | | | Residency: | International | | | Living? : |
Deceased
| | | | |
| 28 | Name: | Leslie W. Miller | | | Year Elected: | 1899 | | | Residency: | Resident | | | Living? : |
Deceased
| | | Birth Date: | 1849 | | | Death Date: | 3/7/31 | | | | |
| 29 | Name: | Harrison S. Morris | | | Year Elected: | 1899 | | | Class: | 4. Humanities | | | Residency: | Resident | | | Living? : |
Deceased
| | | Birth Date: | 1857 | | | Death Date: | 4/12/48 | | | | |
| 30 | Name: | Israel W. Morris | | | Year Elected: | 1899 | | | Residency: | Resident | | | Living? : |
Deceased
| | | Birth Date: | 1833 | | | Death Date: | 12/18/09 | | | | |
| 31 | Name: | J. Rodman Paul | | | Year Elected: | 1899 | | | Class: | 3. Social Sciences | | | Residency: | Resident | | | Living? : |
Deceased
| | | Birth Date: | 1853 | | | Death Date: | 1/27/41 | | | | |
| 32 | Name: | Francis C. Phillips | | | Year Elected: | 1899 | | | Residency: | Resident | | | Living? : |
Deceased
| | | Birth Date: | 1851 | | | Death Date: | 2/16/20 | | | | |
| 33 | Name: | Henri J. Poincare | | | Year Elected: | 1899 | | | Residency: | International | | | Living? : |
Deceased
| | | | |
| 34 | Name: | Sir William H. Preece | | | Year Elected: | 1899 | | | Residency: | International | | | Living? : |
Deceased
| | | | |
| 35 | Name: | Henry S. Pritchet | | | Year Elected: | 1899 | | | Residency: | Resident | | | Living? : |
Deceased
| | | Birth Date: | 1857 | | | Death Date: | 8/28/39 | | | | |
| 36 | Name: | William Ramsay | | | Year Elected: | 1899 | | | Class: | 1. Mathematical and Physical Sciences | | | Residency: | International | | | Living? : |
Deceased
| | | Birth Date: | 1852 | | | | |
| 37 | Name: | William B. Rawle | | | Year Elected: | 1899 | | | Residency: | Resident | | | Living? : |
Deceased
| | | Birth Date: | 1843 | | | Death Date: | 11/30/15 | | | | |
| 38 | Name: | Joseph P. Remington | | | Year Elected: | 1899 | | | Residency: | Resident | | | Living? : |
Deceased
| | | Birth Date: | 1848 | | | Death Date: | 1/1/1918 | | | | |
| 39 | Name: | Hugo A. Rennert | | | Year Elected: | 1899 | | | Residency: | Resident | | | Living? : |
Deceased
| | | Death Date: | 3/18/04 | | | | |
| 40 | Name: | Gustave Schlegel | | | Year Elected: | 1899 | | | Residency: | International | | | Living? : |
Deceased
| | | | |
| |