National Museum of American History
A wooden bar (6-1/8" x 2" x 3/4") is attached to a flat wooden handle (17-7/8" x 2" x 1/8") by nine wooden pegs. By the 17th century, draftsmen used T-squares to help them draw horizontal lines.
New Smithsonian wing shows how pop culture tells America's history
Historians and History Museums: Offsite Sessions at the
ComicsDC: Exhibit review: Superheroes at the National Museum of
National Museum of American History
Smithsonian National Museum of American History
130+ National Museum Of African American History And Culture Stock Photos, Pictures & Royalty-Free Images - iStock
National Museum of American History — Museum Review
National Museum of American History
National Museum of American History Family Guide: 9 Tips to Know
Review: The Smithsonian African American Museum Is Here at Last. And It Uplifts and Upsets. - The New York Times
National Museum of American History
