National Museum of American History

These beveled boxwood rules are faced with white celluloid on the sloping edges. On both rules, one edge is divided to 1/32" and numbered by ones twice. The 18-3/4" rule is numbered from 0 to 36 and from 0 to 18, and the 12-3/4" rule is numbered from 0 to 24 and from 0 to 12.

National Museum of African American History and Culture - Ralph Appelbaum Associates

National Museum of American History — Museum Review

National Museum of African American History and Culture named best

20+ National Museum Of American History Stock Photos, Pictures

National Museum of African American history and culture

National Museum of American History Pictures: View Photos & Images of National Museum of American History

National Museum of African American History and Culture

National Museum of American History, Washington, DC, USA

National Museum of American History - Euan's Guide