Patent model for invention of lifting boats over shoals by Abraham Lincoln at National Museum of American History. Washington, DC.

Patent model for invention of lifting boats over shoals (1849) by Abraham Lincoln at National Museum of American History. Washington, DC.

Patent model for invention of lifting boats over shoals (1849) by Abraham Lincoln at National Museum of American History. Washington, DC.
Photo by Jim Steinhart © 2013, all rights reserved. (Ref: DCMI1613)

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National Museum of American History, Presidential Collection, Washington, DC