- Massachusetts Medical Society.1
- McGuire, J. C. (James Clark), 1812-18881
- Medical Library of the Philadelphia Almshouse, compiler.1
- Medina, José Toribio, 1852-1930, author1
- Mitchell, S. Weir (Silas Weir), 1829-1914, compiler1
- Munsell, Joel, 1808-1880, compiler1
- Müller, August F. (August Frederick)1
- Neill, John, 1819-1880, compiler1
- New York Academy of Medicine. Library, compiler.1
- New York Hospital. Library, author.3
- New York Hospital. Library.5
- New York State Library, compiler.1
- Olaguíbel, Manuel de, 1845-1900, author1
- Paine, Nathaniel, 1832-1917, compiler1
- Parsons, S. B. (Scott Burrill), 1842-1900, compiler1
- Patton, George Farrar, compiler1
- Pennsylvania Hospital (Philadelphia, Pa.). Medical Library, compiler.1
- Pilling, James Constantine, 1846-1895, author1
- Priestley, Joseph, 1733-18044
- Public Library of Cincinnati and Hamilton County, compiler.1