Names
- Munro, William Bennett, 1875-1957.1
- Murfin, James Orin, 1875-1940.1
- Murphy, Frank, 1890-1949.1
- Murrow, Edward R.1
- Nelson, J. Raleigh (Joseph Raleigh)1
- Newberry, Truman Handy, 1864-1945.1
- Ogg, Frederic Austin, 1878-1951.1
- Panama Canal.1
- Perkins, Dexter, 1889-1
- Pollock, James K. (James Kerr), 1898-1968.1
- Pollock, James Kerr, 1898-1
- Rackham Arthritis Research Unit (University of Michigan)1
- Ray, P. Orman (Perley Orman), 1875-1
- Ray, P. Orman (Perley Orman), 1875.1
- Reeves, Jesse Siddall, 1871-19421
- Reeves, Jesse Siddall, 1872-1942.1
- Root, Elihu, 1845-1937.1
- Rowe, Leo S., 1871-1946.1
- Ruthven, Alexander Grant, 1882-1
- Ruthven, Alexander Grant, 1882-1971.1