- Peterson, Frederick, 1859-1938 author7
- Phelps, A. M. (Abel Mix), 1851-1902, author7
- Pierce, R. V. (Ray Vaughn), 1840-19147
- Potter, William W. (William Warren), 1837-1911, author7
- Putnam, James Jackson, 1846-1918 author7
- Richardson, W. L. (William Lambert), 1842-1932, author7
- Riley, Charles V. (Charles Valentine), 1843-1895, author7
- Robinson, Andrew Rose, 1845-1924, author7
- Rood, Ogden N. (Ogden Nicholas), 1831-1902, author7
- Roosa, D. B. St. John (Daniel Bennett St. John), 1838-1908, author7
- Ruddock, E. H. (Edward Harris), 1822-18757
- Rusby, Henry Hurd, 1855-19407
- Shattuck, Frederick Cheever, 1847-1929, author7
- Shoemaker, John V. (John Veitch), 1852-19107
- Sims, J. Marion (James Marion), 1813-1883, author7
- Skene, Alexander J. C. (Alexander Johnston Chalmers), 1838-19007
- Skene, Alexander J. C. (Alexander Johnston Chalmers), 1838-1900, author7
- Suffolk District Medical Society (Suffolk County, Mass.)7
- Thomas, Charles Hermon, author7
- Turnbull, Laurence, 1821-1900, author7