Names
- Campbell family.1
- Campbell, Robert Clair, 1870-1945.1
- Campbell, William, 1829-1
- Chapin, Roy D. (Roy Dikeman), 1880-1936.1
- Civil War.1
- Codd, George Pierre, 1869-1927.1
- Comstock, William Alfred, 1877-1949.1
- Cooley, Mortimer E. (Mortimer Elwyn), 1855-1944.1
- Cooley, Thomas McIntyre, 1824-1898.1
- Coolidge, Calvin, 1872-1933.1
- Copper Mines and Mining1
- Cotter, William Edward, 1893-1957.1
- Couzens, James, 1872-1936.1
- Curtis, Charles.1
- Cutcheon, Sullivan M., 1843-1900.1
- Dame, Gilman Marston, 1866-1939.1
- Davidson, O. C.1
- De Kruif, Paul, 1890-1971.1
- DeFoe, Murl Holcomb, 1879-1
- Denby, Edwin, 1870-1929.1