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- Cattell, Henry W. (Henry Ware), 1862-1936, author3
- Cerna, David, 1857- , author3
- Chamberlain, W. M. (William Mellen), 1826-1887, author3
- Channing, William F. (William Francis), 1820-19013
- Chapin, Charles V. (Charles Value), 1856-1941, author3
- Chapman, E. N. (Edwin Nesbit), 1819-1888, author3
- Charles N. Crittenton Co.3
- Chicago (Ill.). Board of Sewerage Commissioners.3
- Children's Free Hospital Association (Detroit, Mich.), author.3
- Church, Archibald, 1861-1952 author3
- Clarke, Augustus P. (Augustus Peck), 1833- author3
- Cleveland, Clement, 1843-1934 author3
- Clinico-Pathological Society of Washington, D.C.3
- Clowes, Frank, 1848-1923, author3
- Coale, William-Edward, 1816?-18653
- Coleman, John S. (John Scott), 1837-1892 author3
- Confederate States of America. War Department3
- Coni, Emilio R. (Emilio RamoĢn)3
- Conklin, W. J. (William Judkins), 1844-19163