- Boys--Societies and clubs.1
- Boys.1
- Bremen (Aeroplane)1
- Brenger, Henry, 1867-1952.1
- Brewster, Owen, 1888-1961.1
- Bryan, William Jennings, 1860-1925.1
- Building failures.1
- Buildings -- Washington (D.C." Lutheran Church in America.1
- Bulldog.1
- Burial1
- Business enterprises--Washington, D.C.1
- Businessmen.1
- Butler, Smedley D. (Smedley Darlington), 1881-1940.1
- Byrd, Richard Evelyn, 1888-1957.1
- Byrns, Joseph Wellington, 1869-1936.1
- CBS News.1
- Cable cars (Streetcars)1
- Calhoun, John C. (John Caldwell), 1782-18501
- Calves.1
- Cameras.1