National Museum of American History

This hollow white plastic instrument has paper scales. One side has a 39-inch ruler, divided to 1/8" along the top and to 1/2" along the bottom. Alternate pairs of half-inches are colored orange on the bottom scale.

Explore Who We Are at the National Museum of American History

National Museum of American History, Washington, DC - Book Tickets

National Museum of African American History and Culture – Museum Review

National Museum of American History

The entrance to the Smithsonian Institution, National Museum of

Smithsonian National Museum of African American History & Culture Reviews

National Museum of African American History and Culture

Smithsonian opens new, diverse U.S. history timeline

Presente! exhibit opens on the National Mall in Washington D.C : NPR

National Museum of American History

National Museum of American History - Carltonaut's Travel Tips